12878811231 has 32 divisors (see below), whose sum is σ = 20869470720. Its totient is φ = 6956476800.

The previous prime is 12878811203. The next prime is 12878811271. The reversal of 12878811231 is 13211887821.

It is a happy number.

It is not a de Polignac number, because 12878811231 - 2⁶ = 12878811167 is a prime.

It is a super-2 number, since 2×12878811231² (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 (12878811271) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 505155 + ... + 530036.

It is an arithmetic number, because the mean of its divisors is an integer number (652170960).

Almost surely, 2^12878811231 is an apocalyptic number.

12878811231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12878811231 is a deficient number, since it is larger than the sum of its proper divisors (7990659489).

12878811231 is a wasteful number, since it uses less digits than its factorization.

12878811231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1035247.

The product of its digits is 43008, while the sum is 42.

The spelling of 12878811231 in words is "twelve billion, eight hundred seventy-eight million, eight hundred eleven thousand, two hundred thirty-one".