311231120130013 has 8 divisors (see below), whose sum is σ = 317797440142968. Its totient is φ = 304727040117504.

The previous prime is 311231120129999. The next prime is 311231120130109. The reversal of 311231120130013 is 310031021132113.

It can be written as a sum of positive squares in 4 ways, for example, as 112949856517369 + 198281263612644 = 10627787^2 + 14081238^2 .

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 311231120130013 - 2¹³ = 311231120121821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311231120130613) 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, 15559990006 + ... + 15560010007.

It is an arithmetic number, because the mean of its divisors is an integer number (39724680017871).

Almost surely, 2^{311231120130013} is an apocalyptic number.

It is an amenable number.

311231120130013 is a deficient number, since it is larger than the sum of its proper divisors (6566320012955).

311231120130013 is a wasteful number, since it uses less digits than its factorization.

311231120130013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31120000223.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 311231120130013 its reverse (310031021132113), we get a palindrome (621262141262126).

The spelling of 311231120130013 in words is "three hundred eleven trillion, two hundred thirty-one billion, one hundred twenty million, one hundred thirty thousand, thirteen".