31021013120023 has 4 divisors (see below), whose sum is σ = 32090703227640. Its totient is φ = 29951323012408.

The previous prime is 31021013120021. The next prime is 31021013120047. The reversal of 31021013120023 is 32002131012013.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31021013120023 - 2¹ = 31021013120021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31021013120021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 534845053765 + ... + 534845053822.

It is an arithmetic number, because the mean of its divisors is an integer number (8022675806910).

Almost surely, 2^{31021013120023} is an apocalyptic number.

31021013120023 is a deficient number, since it is larger than the sum of its proper divisors (1069690107617).

31021013120023 is a wasteful number, since it uses less digits than its factorization.

31021013120023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069690107616.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31021013120023 its reverse (32002131012013), we get a palindrome (63023144132036).

The spelling of 31021013120023 in words is "thirty-one trillion, twenty-one billion, thirteen million, one hundred twenty thousand, twenty-three".