1231100031313 has 4 divisors (see below), whose sum is σ = 1232044852288. Its totient is φ = 1230155210340.

The previous prime is 1231100031263. The next prime is 1231100031323. The reversal of 1231100031313 is 3131300011321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1231100031313 - 2⁹ = 1231100030801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231100031323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 472408533 + ... + 472411138.

It is an arithmetic number, because the mean of its divisors is an integer number (308011213072).

Almost surely, 2^{1231100031313} is an apocalyptic number.

It is an amenable number.

1231100031313 is a deficient number, since it is larger than the sum of its proper divisors (944820975).

1231100031313 is an equidigital number, since it uses as much as digits as its factorization.

1231100031313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944820974.

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

Adding to 1231100031313 its reverse (3131300011321), we get a palindrome (4362400042634).

The spelling of 1231100031313 in words is "one trillion, two hundred thirty-one billion, one hundred million, thirty-one thousand, three hundred thirteen".