31023313111321 has 4 divisors (see below), whose sum is σ = 31023677546512. Its totient is φ = 31022948676132.

The previous prime is 31023313111289. The next prime is 31023313111331. The reversal of 31023313111321 is 12311131332013.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31023313111321 - 2⁵ = 31023313111289 is a prime.

It is a super-2 number, since 2×31023313111321² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31023313111331) 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, 182089875 + ... + 182260168.

It is an arithmetic number, because the mean of its divisors is an integer number (7755919386628).

Almost surely, 2^{31023313111321} is an apocalyptic number.

It is an amenable number.

31023313111321 is a deficient number, since it is larger than the sum of its proper divisors (364435191).

31023313111321 is an equidigital number, since it uses as much as digits as its factorization.

31023313111321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364435190.

The product of its (nonzero) digits is 972, while the sum is 25.

Adding to 31023313111321 its reverse (12311131332013), we get a palindrome (43334444443334).

The spelling of 31023313111321 in words is "thirty-one trillion, twenty-three billion, three hundred thirteen million, one hundred eleven thousand, three hundred twenty-one".