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1212221130 = 23540407371
BaseRepresentation
bin100100001000001…
…0000011011001010
310010111000012202220
41020100100123022
54440312034010
6320142034510
742016465251
oct11020203312
93114005686
101212221130
115722a374a
12299b78a36
131641b3013
14b6dd1798
1571651970
hex484106ca

1212221130 has 16 divisors (see below), whose sum is σ = 2909330784. Its totient is φ = 323258960.

The previous prime is 1212221119. The next prime is 1212221149. The reversal of 1212221130 is 311222121.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20203656 + ... + 20203715.

It is an arithmetic number, because the mean of its divisors is an integer number (181833174).

Almost surely, 21212221130 is an apocalyptic number.

1212221130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1212221130 is an abundant number, since it is smaller than the sum of its proper divisors (1697109654).

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

1212221130 is a wasteful number, since it uses less digits than its factorization.

1212221130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40407381.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1212221130 is about 34816.9661228545. The cubic root of 1212221130 is about 1066.2538605531.

Adding to 1212221130 its reverse (311222121), we get a palindrome (1523443251).

Subtracting from 1212221130 its reverse (311222121), we obtain a palindrome (900999009).

The spelling of 1212221130 in words is "one billion, two hundred twelve million, two hundred twenty-one thousand, one hundred thirty".

Divisors: 1 2 3 5 6 10 15 30 40407371 80814742 121222113 202036855 242444226 404073710 606110565 1212221130