1231113313 has 8 divisors (see below), whose sum is σ = 1235721960. Its totient is φ = 1226513280.

The previous prime is 1231113283. The next prime is 1231113329. The reversal of 1231113313 is 3133111321.

It can be written as a sum of positive squares in 4 ways, for example, as 202435984 + 1028677329 = 14228^2 + 32073^2 .

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 1231113313 - 2⁵ = 1231113281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231113343) 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, 432531 + ... + 435367.

It is an arithmetic number, because the mean of its divisors is an integer number (154465245).

Almost surely, 2^1231113313 is an apocalyptic number.

It is an amenable number.

1231113313 is a deficient number, since it is larger than the sum of its proper divisors (4608647).

1231113313 is a wasteful number, since it uses less digits than its factorization.

1231113313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4307.

The product of its digits is 162, while the sum is 19.

The square root of 1231113313 is about 35087.2243558820. The cubic root of 1231113313 is about 1071.7644376527.

Adding to 1231113313 its reverse (3133111321), we get a palindrome (4364224634).

The spelling of 1231113313 in words is "one billion, two hundred thirty-one million, one hundred thirteen thousand, three hundred thirteen".