124402661621 has 24 divisors (see below), whose sum is σ = 146208053376. Its totient is φ = 105530359200.

The previous prime is 124402661611. The next prime is 124402661687. The reversal of 124402661621 is 126166204421.

It is not a de Polignac number, because 124402661621 - 2¹⁰ = 124402660597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124402661611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17451560 + ... + 17458686.

It is an arithmetic number, because the mean of its divisors is an integer number (6092002224).

Almost surely, 2^124402661621 is an apocalyptic number.

It is an amenable number.

124402661621 is a deficient number, since it is larger than the sum of its proper divisors (21805391755).

124402661621 is a wasteful number, since it uses less digits than its factorization.

124402661621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10769 (or 10762 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The spelling of 124402661621 in words is "one hundred twenty-four billion, four hundred two million, six hundred sixty-one thousand, six hundred twenty-one".