12131039881 has 9 divisors (see below), whose sum is σ = 12288218061. Its totient is φ = 11975851212.

The previous prime is 12131039867. The next prime is 12131039903. The reversal of 12131039881 is 18893013121.

The square root of 12131039881 is 110141.

It is a perfect power (a square), and thus also a powerful number.

It is a de Polignac number, because none of the positive numbers 2^k-12131039881 is a prime.

It is a super-2 number, since 2×12131039881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12131039881.

It is not an unprimeable number, because it can be changed into a prime (12131039831) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 9141040 + ... + 9142366.

Almost surely, 2^12131039881 is an apocalyptic number.

12131039881 is the 110141-st square number.

12131039881 is the 55071-st centered octagonal number.

It is an amenable number.

12131039881 is a deficient number, since it is larger than the sum of its proper divisors (157178180).

12131039881 is an frugal number, since it uses more digits than its factorization.

12131039881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2820 (or 1410 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 37.

The spelling of 12131039881 in words is "twelve billion, one hundred thirty-one million, thirty-nine thousand, eight hundred eighty-one".