124102031021 has 4 divisors (see below), whose sum is σ = 124102756512. Its totient is φ = 124101305532.

The previous prime is 124102031003. The next prime is 124102031023. The reversal of 124102031021 is 120130201421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 120130201421 = 1231 ⋅97587491.

It is a cyclic number.

It is not a de Polignac number, because 124102031021 - 2²⁶ = 124034922157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124102031023) 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, 51626 + ... + 500868.

It is an arithmetic number, because the mean of its divisors is an integer number (31025689128).

Almost surely, 2^124102031021 is an apocalyptic number.

It is an amenable number.

124102031021 is a deficient number, since it is larger than the sum of its proper divisors (725491).

124102031021 is an equidigital number, since it uses as much as digits as its factorization.

124102031021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725490.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 124102031021 its reverse (120130201421), we get a palindrome (244232232442).

The spelling of 124102031021 in words is "one hundred twenty-four billion, one hundred two million, thirty-one thousand, twenty-one".