12161055512 has 128 divisors (see below), whose sum is σ = 25096780800. Its totient is φ = 5508518400.

The previous prime is 12161055493. The next prime is 12161055521. The reversal of 12161055512 is 21555016121.

It is a super-4 number, since 4×12161055512⁴ (a number of 41 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67188062 + ... + 67188242.

It is an arithmetic number, because the mean of its divisors is an integer number (196068600).

Almost surely, 2^12161055512 is an apocalyptic number.

It is an amenable number.

12161055512 is an abundant number, since it is smaller than the sum of its proper divisors (12935725288).

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

12161055512 is a wasteful number, since it uses less digits than its factorization.

12161055512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457 (or 453 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 29.

The spelling of 12161055512 in words is "twelve billion, one hundred sixty-one million, fifty-five thousand, five hundred twelve".