12261775172 has 12 divisors (see below), whose sum is σ = 22587480720. Its totient is φ = 5808209256.

The previous prime is 12261775129. The next prime is 12261775177. The reversal of 12261775172 is 27157716221.

It is a super-2 number, since 2×12261775172² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12261775177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80669498 + ... + 80669649.

It is an arithmetic number, because the mean of its divisors is an integer number (1882290060).

Almost surely, 2^12261775172 is an apocalyptic number.

It is an amenable number.

12261775172 is a deficient number, since it is larger than the sum of its proper divisors (10325705548).

12261775172 is a wasteful number, since it uses less digits than its factorization.

12261775172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161339170 (or 161339168 counting only the distinct ones).

The product of its digits is 82320, while the sum is 41.

The spelling of 12261775172 in words is "twelve billion, two hundred sixty-one million, seven hundred seventy-five thousand, one hundred seventy-two".