124143232121 has 4 divisors (see below), whose sum is σ = 128147852544. Its totient is φ = 120138611700.

The previous prime is 124143232111. The next prime is 124143232163. The reversal of 124143232121 is 121232341421.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 121232341421 = 31 ⋅3910720691.

It is a cyclic number.

It is not a de Polignac number, because 124143232121 - 2²⁶ = 124076123257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124143232111) 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, 2002310165 + ... + 2002310226.

It is an arithmetic number, because the mean of its divisors is an integer number (32036963136).

Almost surely, 2^124143232121 is an apocalyptic number.

It is an amenable number.

124143232121 is a deficient number, since it is larger than the sum of its proper divisors (4004620423).

124143232121 is an equidigital number, since it uses as much as digits as its factorization.

124143232121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4004620422.

The product of its digits is 2304, while the sum is 26.

Adding to 124143232121 its reverse (121232341421), we get a palindrome (245375573542).

The spelling of 124143232121 in words is "one hundred twenty-four billion, one hundred forty-three million, two hundred thirty-two thousand, one hundred twenty-one".