123000022031 has 4 divisors (see below), whose sum is σ = 123001572672. Its totient is φ = 122998471392.

The previous prime is 123000021971. The next prime is 123000022063. The reversal of 123000022031 is 130220000321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130220000321 = 346421 ⋅375901.

It is a cyclic number.

It is not a de Polignac number, because 123000022031 - 2¹⁴ = 123000005647 is a prime.

It is a super-2 number, since 2×123000022031² (a number of 23 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 = 123000021997 and 123000022015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123000022231) 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, 649535 + ... + 817248.

It is an arithmetic number, because the mean of its divisors is an integer number (30750393168).

Almost surely, 2^123000022031 is an apocalyptic number.

123000022031 is a deficient number, since it is larger than the sum of its proper divisors (1550641).

123000022031 is an equidigital number, since it uses as much as digits as its factorization.

123000022031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1550640.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 123000022031 its reverse (130220000321), we get a palindrome (253220022352).

The spelling of 123000022031 in words is "one hundred twenty-three billion, twenty-two thousand, thirty-one".