31311203311023 has 16 divisors (see below), whose sum is σ = 42719615769600. Its totient is φ = 20388473529984.

The previous prime is 31311203311001. The next prime is 31311203311043. The reversal of 31311203311023 is 32011330211313.

It is not a de Polignac number, because 31311203311023 - 2¹³ = 31311203302831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31311203310984 and 31311203311002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31311203311043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11353890 + ... + 13839552.

It is an arithmetic number, because the mean of its divisors is an integer number (2669975985600).

Almost surely, 2^{31311203311023} is an apocalyptic number.

31311203311023 is a deficient number, since it is larger than the sum of its proper divisors (11408412458577).

31311203311023 is a wasteful number, since it uses less digits than its factorization.

31311203311023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2583358.

The product of its (nonzero) digits is 972, while the sum is 24.

Adding to 31311203311023 its reverse (32011330211313), we get a palindrome (63322533522336).

The spelling of 31311203311023 in words is "thirty-one trillion, three hundred eleven billion, two hundred three million, three hundred eleven thousand, twenty-three".