231301120031 has 2 divisors, whose sum is σ = 231301120032. Its totient is φ = 231301120030.

The previous prime is 231301120027. The next prime is 231301120033. The reversal of 231301120031 is 130021103132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231301120031 - 2² = 231301120027 is a prime.

It is a super-2 number, since 2×231301120031² (a number of 24 digits) contains 22 as substring.

Together with 231301120033, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 231301119991 and 231301120009.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231301120033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115650560015 + 115650560016.

It is an arithmetic number, because the mean of its divisors is an integer number (115650560016).

Almost surely, 2^231301120031 is an apocalyptic number.

231301120031 is a deficient number, since it is larger than the sum of its proper divisors (1).

231301120031 is an equidigital number, since it uses as much as digits as its factorization.

231301120031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 231301120031 its reverse (130021103132), we get a palindrome (361322223163).

The spelling of 231301120031 in words is "two hundred thirty-one billion, three hundred one million, one hundred twenty thousand, thirty-one".