124404344021 has 4 divisors (see below), whose sum is σ = 124685166912. Its totient is φ = 124123521132.

The previous prime is 124404344017. The next prime is 124404344023. The reversal of 124404344021 is 120443404421.

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.

It is a cyclic number.

It is not a de Polignac number, because 124404344021 - 2² = 124404344017 is a prime.

It is a super-2 number, since 2×124404344021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124404344023) 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, 140410781 + ... + 140411666.

It is an arithmetic number, because the mean of its divisors is an integer number (31171291728).

Almost surely, 2^124404344021 is an apocalyptic number.

It is an amenable number.

124404344021 is a deficient number, since it is larger than the sum of its proper divisors (280822891).

124404344021 is an equidigital number, since it uses as much as digits as its factorization.

124404344021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280822890.

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 124404344021 its reverse (120443404421), we get a palindrome (244847748442).

The spelling of 124404344021 in words is "one hundred twenty-four billion, four hundred four million, three hundred forty-four thousand, twenty-one".