311032013012231 has 4 divisors (see below), whose sum is σ = 355465157728272. Its totient is φ = 266598868296192.

The previous prime is 311032013012221. The next prime is 311032013012239. The reversal of 311032013012231 is 132210310230113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311032013012231 is a prime.

It is a super-2 number, since 2×311032013012231² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311032013012197 and 311032013012206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311032013012239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22216572358010 + ... + 22216572358023.

It is an arithmetic number, because the mean of its divisors is an integer number (88866289432068).

Almost surely, 2^{311032013012231} is an apocalyptic number.

311032013012231 is a deficient number, since it is larger than the sum of its proper divisors (44433144716041).

311032013012231 is an equidigital number, since it uses as much as digits as its factorization.

311032013012231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44433144716040.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 311032013012231 its reverse (132210310230113), we get a palindrome (443242323242344).

The spelling of 311032013012231 in words is "three hundred eleven trillion, thirty-two billion, thirteen million, twelve thousand, two hundred thirty-one".