124122112421 has 4 divisors (see below), whose sum is σ = 130654855200. Its totient is φ = 117589369644.

The previous prime is 124122112417. The next prime is 124122112483. The reversal of 124122112421 is 124211221421.

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 124122112421 - 2² = 124122112417 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 (124122112021) 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, 3266371361 + ... + 3266371398.

It is an arithmetic number, because the mean of its divisors is an integer number (32663713800).

Almost surely, 2^124122112421 is an apocalyptic number.

It is an amenable number.

124122112421 is a deficient number, since it is larger than the sum of its proper divisors (6532742779).

124122112421 is an equidigital number, since it uses as much as digits as its factorization.

124122112421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6532742778.

The product of its digits is 512, while the sum is 23.

Adding to 124122112421 its reverse (124211221421), we get a palindrome (248333333842).

The spelling of 124122112421 in words is "one hundred twenty-four billion, one hundred twenty-two million, one hundred twelve thousand, four hundred twenty-one".