12721431184 has 80 divisors (see below), whose sum is σ = 30796886016. Its totient is φ = 4945564800.

The previous prime is 12721431167. The next prime is 12721431197. The reversal of 12721431184 is 48113412721.

It is a super-2 number, since 2×12721431184² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 564289 + ... + 586399.

Almost surely, 2^12721431184 is an apocalyptic number.

12721431184 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12721431184, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15398443008).

12721431184 is an abundant number, since it is smaller than the sum of its proper divisors (18075454832).

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

12721431184 is a wasteful number, since it uses less digits than its factorization.

12721431184 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22604 (or 22598 counting only the distinct ones).

The product of its digits is 10752, while the sum is 34.

The spelling of 12721431184 in words is "twelve billion, seven hundred twenty-one million, four hundred thirty-one thousand, one hundred eighty-four".