31201320023 has 16 divisors (see below), whose sum is σ = 32608003680. Its totient is φ = 29818244736.

The previous prime is 31201320019. The next prime is 31201320037. The reversal of 31201320023 is 32002310213.

It is a cyclic number.

It is not a de Polignac number, because 31201320023 - 2² = 31201320019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31201319983 and 31201320010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31201320043) 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, 1125161 + ... + 1152557.

It is an arithmetic number, because the mean of its divisors is an integer number (2038000230).

Almost surely, 2^31201320023 is an apocalyptic number.

31201320023 is a deficient number, since it is larger than the sum of its proper divisors (1406683657).

31201320023 is a wasteful number, since it uses less digits than its factorization.

31201320023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27826.

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

Adding to 31201320023 its reverse (32002310213), we get a palindrome (63203630236).

The spelling of 31201320023 in words is "thirty-one billion, two hundred one million, three hundred twenty thousand, twenty-three".