1231102131 has 32 divisors (see below), whose sum is σ = 1979228160. Its totient is φ = 664933536.

The previous prime is 1231102129. The next prime is 1231102189. The reversal of 1231102131 is 1312011321.

It is a happy number.

It is not a de Polignac number, because 1231102131 - 2¹ = 1231102129 is a prime.

It is a super-2 number, since 2×1231102131² = 3031224913905482322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1231102131.

It is not an unprimeable number, because it can be changed into a prime (1231102111) 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, 183030 + ... + 189636.

It is an arithmetic number, because the mean of its divisors is an integer number (61850880).

Almost surely, 2^1231102131 is an apocalyptic number.

1231102131 is a deficient number, since it is larger than the sum of its proper divisors (748126029).

1231102131 is a wasteful number, since it uses less digits than its factorization.

1231102131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7103.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1231102131 is about 35087.0650097725. The cubic root of 1231102131 is about 1071.7611927561.

Adding to 1231102131 its reverse (1312011321), we get a palindrome (2543113452).

The spelling of 1231102131 in words is "one billion, two hundred thirty-one million, one hundred two thousand, one hundred thirty-one".