311330212320031 has 4 divisors (see below), whose sum is σ = 311330668775272. Its totient is φ = 311329755864792.

The previous prime is 311330212319981. The next prime is 311330212320047. The reversal of 311330212320031 is 130023212033113.

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

It is a cyclic number.

It is not a de Polignac number, because 311330212320031 - 2²⁹ = 311329675449119 is a prime.

It is a super-2 number, since 2×311330212320031² (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 = 311330212319978 and 311330212320005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311330212324031) 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, 227202996 + ... + 228569161.

It is an arithmetic number, because the mean of its divisors is an integer number (77832667193818).

Almost surely, 2^{311330212320031} is an apocalyptic number.

311330212320031 is a deficient number, since it is larger than the sum of its proper divisors (456455241).

311330212320031 is an equidigital number, since it uses as much as digits as its factorization.

311330212320031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456455240.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 311330212320031 its reverse (130023212033113), we get a palindrome (441353424353144).

The spelling of 311330212320031 in words is "three hundred eleven trillion, three hundred thirty billion, two hundred twelve million, three hundred twenty thousand, thirty-one".