31012201220023 has 4 divisors (see below), whose sum is σ = 31733415201928. Its totient is φ = 30290987238120.

The previous prime is 31012201220003. The next prime is 31012201220041. The reversal of 31012201220023 is 32002210221013.

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 31012201220023 - 2⁵ = 31012201219991 is a prime.

It is a super-2 number, since 2×31012201220023² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31012201220003) 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, 360606990888 + ... + 360606990973.

It is an arithmetic number, because the mean of its divisors is an integer number (7933353800482).

Almost surely, 2^{31012201220023} is an apocalyptic number.

31012201220023 is a deficient number, since it is larger than the sum of its proper divisors (721213981905).

31012201220023 is an equidigital number, since it uses as much as digits as its factorization.

31012201220023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721213981904.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 31012201220023 its reverse (32002210221013), we get a palindrome (63014411441036).

The spelling of 31012201220023 in words is "thirty-one trillion, twelve billion, two hundred one million, two hundred twenty thousand, twenty-three".