124249942421 has 4 divisors (see below), whose sum is σ = 135545391744. Its totient is φ = 112954493100.

The previous prime is 124249942379. The next prime is 124249942507.

124249942421 is nontrivially palindromic in base 10.

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 124249942421 - 2⁶ = 124249942357 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 (124249942021) 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, 5647724645 + ... + 5647724666.

It is an arithmetic number, because the mean of its divisors is an integer number (33886347936).

Almost surely, 2^124249942421 is an apocalyptic number.

124249942421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

124249942421 is a deficient number, since it is larger than the sum of its proper divisors (11295449323).

124249942421 is a wasteful number, since it uses less digits than its factorization.

124249942421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11295449322.

The product of its digits is 331776, while the sum is 44.

The spelling of 124249942421 in words is "one hundred twenty-four billion, two hundred forty-nine million, nine hundred forty-two thousand, four hundred twenty-one".