31121331323 has 2 divisors, whose sum is σ = 31121331324. Its totient is φ = 31121331322.

The previous prime is 31121331247. The next prime is 31121331341. The reversal of 31121331323 is 32313312113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31121331323 - 2¹⁰ = 31121330299 is a prime.

It is not a weakly prime, because it can be changed into another prime (31121331023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15560665661 + 15560665662.

It is an arithmetic number, because the mean of its divisors is an integer number (15560665662).

Almost surely, 2^31121331323 is an apocalyptic number.

31121331323 is a deficient number, since it is larger than the sum of its proper divisors (1).

31121331323 is an equidigital number, since it uses as much as digits as its factorization.

31121331323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972, while the sum is 23.

Adding to 31121331323 its reverse (32313312113), we get a palindrome (63434643436).

The spelling of 31121331323 in words is "thirty-one billion, one hundred twenty-one million, three hundred thirty-one thousand, three hundred twenty-three".