12921736312 has 32 divisors (see below), whose sum is σ = 26036352720. Its totient is φ = 5990054400.

The previous prime is 12921736301. The next prime is 12921736313. The reversal of 12921736312 is 21363712921.

It is a super-2 number, since 2×12921736312² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12921736313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 699939 + ... + 718162.

Almost surely, 2^12921736312 is an apocalyptic number.

It is an amenable number.

12921736312 is an abundant number, since it is smaller than the sum of its proper divisors (13114616408).

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

12921736312 is a wasteful number, since it uses less digits than its factorization.

12921736312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1418191 (or 1418187 counting only the distinct ones).

The product of its digits is 27216, while the sum is 37.

The spelling of 12921736312 in words is "twelve billion, nine hundred twenty-one million, seven hundred thirty-six thousand, three hundred twelve".