12210955668 has 54 divisors (see below), whose sum is σ = 32267006954. Its totient is φ = 3893342112.

The previous prime is 12210955643. The next prime is 12210955693. The reversal of 12210955668 is 86655901221.

12210955668 is a `hidden beast` number, since 1 + 22 + 10 + 9 + 556 + 68 = 666.

It is an interprime number because it is at equal distance from previous prime (12210955643) and next prime (12210955693).

It can be written as a sum of positive squares in only one way, i.e., 10598290704 + 1612664964 = 102948^2 + 40158^2 .

It is a super-2 number, since 2×12210955668² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 301555 + ... + 339642.

Almost surely, 2^12210955668 is an apocalyptic number.

12210955668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12210955668 is an abundant number, since it is smaller than the sum of its proper divisors (20056051286).

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

12210955668 is a wasteful number, since it uses less digits than its factorization.

12210955668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641253 (or 641225 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The spelling of 12210955668 in words is "twelve billion, two hundred ten million, nine hundred fifty-five thousand, six hundred sixty-eight".