1231131113 has 8 divisors (see below), whose sum is σ = 1300682880. Its totient is φ = 1163386000.

The previous prime is 1231131107. The next prime is 1231131119. The reversal of 1231131113 is 3111311321.

It is an interprime number because it is at equal distance from previous prime (1231131107) and next prime (1231131119).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1231131113 - 2³⁰ = 157389289 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1231131091 and 1231131100.

It is not an unprimeable number, because it can be changed into a prime (1231131119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 450263 + ... + 452988.

It is an arithmetic number, because the mean of its divisors is an integer number (162585360).

Almost surely, 2^1231131113 is an apocalyptic number.

It is an amenable number.

1231131113 is a deficient number, since it is larger than the sum of its proper divisors (69551767).

1231131113 is an equidigital number, since it uses as much as digits as its factorization.

1231131113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903327.

The product of its digits is 54, while the sum is 17.

The square root of 1231131113 is about 35087.4780085432. The cubic root of 1231131113 is about 1071.7696029815.

Adding to 1231131113 its reverse (3111311321), we get a palindrome (4342442434).

The spelling of 1231131113 in words is "one billion, two hundred thirty-one million, one hundred thirty-one thousand, one hundred thirteen".