20231231110031 has 4 divisors (see below), whose sum is σ = 20264560980672. Its totient is φ = 20197901239392.

The previous prime is 20231231109967. The next prime is 20231231110127. The reversal of 20231231110031 is 13001113213202.

It is a happy number.

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 20231231110031 - 2⁶ = 20231231109967 is a prime.

It is a super-2 number, since 2×20231231110031² (a number of 27 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 = 20231231109985 and 20231231110012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20231231113031) 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, 16664934410 + ... + 16664935623.

It is an arithmetic number, because the mean of its divisors is an integer number (5066140245168).

Almost surely, 2^{20231231110031} is an apocalyptic number.

20231231110031 is a deficient number, since it is larger than the sum of its proper divisors (33329870641).

20231231110031 is an equidigital number, since it uses as much as digits as its factorization.

20231231110031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33329870640.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 20231231110031 its reverse (13001113213202), we get a palindrome (33232344323233).

The spelling of 20231231110031 in words is "twenty trillion, two hundred thirty-one billion, two hundred thirty-one million, one hundred ten thousand, thirty-one".