124257409921 has 16 divisors (see below), whose sum is σ = 125369337600. Its totient is φ = 123152286400.

The previous prime is 124257409907. The next prime is 124257409931. The reversal of 124257409921 is 129904752421.

It is a cyclic number.

It is not a de Polignac number, because 124257409921 - 2¹³ = 124257401729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124257409931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43430031 + ... + 43432891.

It is an arithmetic number, because the mean of its divisors is an integer number (7835583600).

Almost surely, 2^124257409921 is an apocalyptic number.

It is an amenable number.

124257409921 is a deficient number, since it is larger than the sum of its proper divisors (1111927679).

124257409921 is a wasteful number, since it uses less digits than its factorization.

124257409921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3920.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 124257409921 in words is "one hundred twenty-four billion, two hundred fifty-seven million, four hundred nine thousand, nine hundred twenty-one".