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1212220122012 = 223311224260389
BaseRepresentation
bin10001101000111101111…
…100110010001110011100
311021212221201000121222000
4101220331330302032130
5124330111322401022
62324515232122300
7153402642011634
oct21507574621634
94255851017860
101212220122012
11428110724689
12176b2a096390
138a409230633
14429594856c4
15217ec93c6ac
hex11a3df3239c

1212220122012 has 24 divisors (see below), whose sum is σ = 3142792909200. Its totient is φ = 404073373968.

The previous prime is 1212220121933. The next prime is 1212220122019. The reversal of 1212220122012 is 2102210222121.

It is a happy number.

1212220122012 is a `hidden beast` number, since 1 + 212 + 220 + 1 + 220 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212220122019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5612130087 + ... + 5612130302.

It is an arithmetic number, because the mean of its divisors is an integer number (130949704550).

Almost surely, 21212220122012 is an apocalyptic number.

1212220122012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1212220122012 is an abundant number, since it is smaller than the sum of its proper divisors (1930572787188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1212220122012 is a wasteful number, since it uses less digits than its factorization.

1212220122012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11224260402 (or 11224260394 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1212220122012 its reverse (2102210222121), we get a palindrome (3314430344133).

The spelling of 1212220122012 in words is "one trillion, two hundred twelve billion, two hundred twenty million, one hundred twenty-two thousand, twelve".

Divisors: 1 2 3 4 6 9 12 18 27 36 54 108 11224260389 22448520778 33672781167 44897041556 67345562334 101018343501 134691124668 202036687002 303055030503 404073374004 606110061006 1212220122012