31023120023 has 4 divisors (see below), whose sum is σ = 35454994320. Its totient is φ = 26591245728.

The previous prime is 31023120019. The next prime is 31023120041. The reversal of 31023120023 is 32002132013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32002132013 = 89 ⋅359574517.

It is a cyclic number.

It is not a de Polignac number, because 31023120023 - 2² = 31023120019 is a prime.

It is a super-2 number, since 2×31023120023² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31023119983 and 31023120010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31023120053) 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, 2215937138 + ... + 2215937151.

It is an arithmetic number, because the mean of its divisors is an integer number (8863748580).

Almost surely, 2^31023120023 is an apocalyptic number.

31023120023 is a deficient number, since it is larger than the sum of its proper divisors (4431874297).

31023120023 is an equidigital number, since it uses as much as digits as its factorization.

31023120023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4431874296.

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

Adding to 31023120023 its reverse (32002132013), we get a palindrome (63025252036).

The spelling of 31023120023 in words is "thirty-one billion, twenty-three million, one hundred twenty thousand, twenty-three".