31303121323 has 2 divisors, whose sum is σ = 31303121324. Its totient is φ = 31303121322.

The previous prime is 31303121273. The next prime is 31303121347. The reversal of 31303121323 is 32312130313.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31303121323 - 2³³ = 22713186731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31303121294 and 31303121303.

It is not a weakly prime, because it can be changed into another prime (31303121363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15651560661 + 15651560662.

It is an arithmetic number, because the mean of its divisors is an integer number (15651560662).

Almost surely, 2^31303121323 is an apocalyptic number.

31303121323 is a deficient number, since it is larger than the sum of its proper divisors (1).

31303121323 is an equidigital number, since it uses as much as digits as its factorization.

31303121323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 31303121323 its reverse (32312130313), we get a palindrome (63615251636).

The spelling of 31303121323 in words is "thirty-one billion, three hundred three million, one hundred twenty-one thousand, three hundred twenty-three".