1231131411 has 12 divisors (see below), whose sum is σ = 1788128160. Its totient is φ = 816218640.

The previous prime is 1231131401. The next prime is 1231131413. The reversal of 1231131411 is 1141311321.

It is a happy number.

1231131411 is a `hidden beast` number, since 123 + 1 + 131 + 411 = 666.

It is not a de Polignac number, because 1231131411 - 2⁵ = 1231131379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1231131413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 376251 + ... + 379508.

It is an arithmetic number, because the mean of its divisors is an integer number (149010680).

Almost surely, 2^1231131411 is an apocalyptic number.

1231131411 is a deficient number, since it is larger than the sum of its proper divisors (556996749).

1231131411 is a wasteful number, since it uses less digits than its factorization.

1231131411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755946 (or 755943 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

The square root of 1231131411 is about 35087.4822550721. The cubic root of 1231131411 is about 1071.7696894568.

Adding to 1231131411 its reverse (1141311321), we get a palindrome (2372442732).

The spelling of 1231131411 in words is "one billion, two hundred thirty-one million, one hundred thirty-one thousand, four hundred eleven".