12721256332 has 18 divisors (see below), whose sum is σ = 23648773652. Its totient is φ = 5986473024.

The previous prime is 12721256311. The next prime is 12721256351. The reversal of 12721256332 is 23365212721.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5501118 + ... + 5503429.

Almost surely, 2^12721256332 is an apocalyptic number.

It is an amenable number.

12721256332 is a deficient number, since it is larger than the sum of its proper divisors (10927517320).

12721256332 is a wasteful number, since it uses less digits than its factorization.

12721256332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11004585 (or 11004566 counting only the distinct ones).

The product of its digits is 30240, while the sum is 34.

The spelling of 12721256332 in words is "twelve billion, seven hundred twenty-one million, two hundred fifty-six thousand, three hundred thirty-two".