123023023012021 has 16 divisors (see below), whose sum is σ = 138913673084928. Its totient is φ = 107936489991600.

The previous prime is 123023023012003. The next prime is 123023023012033. The reversal of 123023023012021 is 120210320320321.

It is a cyclic number.

It is not a de Polignac number, because 123023023012021 - 2²¹ = 123023020914869 is a prime.

It is a super-2 number, since 2×123023023012021² (a number of 29 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 = 123023023011983 and 123023023012001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123023023012051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 491388925 + ... + 491639218.

It is an arithmetic number, because the mean of its divisors is an integer number (8682104567808).

Almost surely, 2^{123023023012021} is an apocalyptic number.

123023023012021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

123023023012021 is a deficient number, since it is larger than the sum of its proper divisors (15890650072907).

123023023012021 is a wasteful number, since it uses less digits than its factorization.

123023023012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 983028552.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 123023023012021 its reverse (120210320320321), we get a palindrome (243233343332342).

The spelling of 123023023012021 in words is "one hundred twenty-three trillion, twenty-three billion, twenty-three million, twelve thousand, twenty-one".