1231132131 has 6 divisors (see below), whose sum is σ = 1778301980. Its totient is φ = 820754748.

The previous prime is 1231132121. The next prime is 1231132141. The reversal of 1231132131 is 1312311321.

1231132131 is a `hidden beast` number, since 1 + 2 + 311 + 321 + 31 = 666.

It is an interprime number because it is at equal distance from previous prime (1231132121) and next prime (1231132141).

It is not a de Polignac number, because 1231132131 - 2¹⁰ = 1231131107 is a prime.

It is a super-2 number, since 2×1231132131² = 3031372647961202322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231132121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 68396221 + ... + 68396238.

Almost surely, 2^1231132131 is an apocalyptic number.

1231132131 is a deficient number, since it is larger than the sum of its proper divisors (547169849).

1231132131 is a wasteful number, since it uses less digits than its factorization.

1231132131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136792465 (or 136792462 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 1231132131 is about 35087.4925151399. The cubic root of 1231132131 is about 1071.7698983903.

Adding to 1231132131 its reverse (1312311321), we get a palindrome (2543443452).

The spelling of 1231132131 in words is "one billion, two hundred thirty-one million, one hundred thirty-two thousand, one hundred thirty-one".