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12212120 = 2351717959
BaseRepresentation
bin101110100101…
…011110011000
3211222102212202
4232211132120
511111241440
61113425332
7205541564
oct56453630
924872782
1012212120
116991168
12410b248
1326b770b
14189c6a4
151113615
hexba5798

12212120 has 32 divisors (see below), whose sum is σ = 29095200. Its totient is φ = 4597248.

The previous prime is 12212119. The next prime is 12212131. The reversal of 12212120 is 2121221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8300 + ... + 9659.

It is an arithmetic number, because the mean of its divisors is an integer number (909225).

Almost surely, 212212120 is an apocalyptic number.

12212120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12212120 is an abundant number, since it is smaller than the sum of its proper divisors (16883080).

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

12212120 is a wasteful number, since it uses less digits than its factorization.

12212120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17987 (or 17983 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 12212120 is about 3494.5843815825. The cubic root of 12212120 is about 230.2839592969.

Adding to 12212120 its reverse (2121221), we get a palindrome (14333341).

The spelling of 12212120 in words is "twelve million, two hundred twelve thousand, one hundred twenty".

Divisors: 1 2 4 5 8 10 17 20 34 40 68 85 136 170 340 680 17959 35918 71836 89795 143672 179590 305303 359180 610606 718360 1221212 1526515 2442424 3053030 6106060 12212120