31021230023 has 24 divisors (see below), whose sum is σ = 39295047600. Its totient is φ = 24321523968.

The previous prime is 31021229999. The next prime is 31021230041. The reversal of 31021230023 is 32003212013.

It is not a de Polignac number, because 31021230023 - 2¹⁰ = 31021228999 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31021229983 and 31021230010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31021230223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 547490 + ... + 601487.

It is an arithmetic number, because the mean of its divisors is an integer number (1637293650).

Almost surely, 2^31021230023 is an apocalyptic number.

31021230023 is a deficient number, since it is larger than the sum of its proper divisors (8273817577).

31021230023 is a wasteful number, since it uses less digits than its factorization.

31021230023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149039 (or 1149032 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 31021230023 its reverse (32003212013), we get a palindrome (63024442036).

The spelling of 31021230023 in words is "thirty-one billion, twenty-one million, two hundred thirty thousand, twenty-three".