123312023021 has 16 divisors (see below), whose sum is σ = 143818167168. Its totient is φ = 104483251200.

The previous prime is 123312023011. The next prime is 123312023027. The reversal of 123312023021 is 120320213321.

It is not a de Polignac number, because 123312023021 - 2²⁶ = 123244914157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123312022984 and 123312023002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123312023027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3181820 + ... + 3220341.

It is an arithmetic number, because the mean of its divisors is an integer number (8988635448).

Almost surely, 2^123312023021 is an apocalyptic number.

123312023021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

123312023021 is a deficient number, since it is larger than the sum of its proper divisors (20506144147).

123312023021 is a wasteful number, since it uses less digits than its factorization.

123312023021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6402292.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 123312023021 its reverse (120320213321), we get a palindrome (243632236342).

The spelling of 123312023021 in words is "one hundred twenty-three billion, three hundred twelve million, twenty-three thousand, twenty-one".