223031312123 has 4 divisors (see below), whose sum is σ = 223087032168. Its totient is φ = 222975592080.

The previous prime is 223031312117. The next prime is 223031312131. The reversal of 223031312123 is 321213130322.

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 223031312123 - 2²⁴ = 223014534907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223031312173) 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, 27854018 + ... + 27862023.

It is an arithmetic number, because the mean of its divisors is an integer number (55771758042).

Almost surely, 2^223031312123 is an apocalyptic number.

223031312123 is a deficient number, since it is larger than the sum of its proper divisors (55720045).

223031312123 is an equidigital number, since it uses as much as digits as its factorization.

223031312123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55720044.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 223031312123 its reverse (321213130322), we get a palindrome (544244442445).

The spelling of 223031312123 in words is "two hundred twenty-three billion, thirty-one million, three hundred twelve thousand, one hundred twenty-three".