12231660028 has 12 divisors (see below), whose sum is σ = 24463320112. Its totient is φ = 5242140000.

The previous prime is 12231659983. The next prime is 12231660031. The reversal of 12231660028 is 82006613221.

12231660028 is an admirable number.

It is a super-2 number, since 2×12231660028² (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 3 ways as a sum of consecutive naturals, for example, 218422473 + ... + 218422528.

Almost surely, 2^12231660028 is an apocalyptic number.

It is an amenable number.

12231660028 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12231660028 is a wasteful number, since it uses less digits than its factorization.

12231660028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436845012 (or 436845010 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The spelling of 12231660028 in words is "twelve billion, two hundred thirty-one million, six hundred sixty thousand, twenty-eight".