124255541221 has 4 divisors (see below), whose sum is σ = 142006332832. Its totient is φ = 106504749612.

The previous prime is 124255541203. The next prime is 124255541233. The reversal of 124255541221 is 122145552421.

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: 122145552421 = 277 ⋅440958673.

It is a cyclic number.

It is not a de Polignac number, because 124255541221 - 2²⁷ = 124121323493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124255541261) 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, 8875395795 + ... + 8875395808.

It is an arithmetic number, because the mean of its divisors is an integer number (35501583208).

Almost surely, 2^124255541221 is an apocalyptic number.

It is an amenable number.

124255541221 is a deficient number, since it is larger than the sum of its proper divisors (17750791611).

124255541221 is an equidigital number, since it uses as much as digits as its factorization.

124255541221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17750791610.

The product of its digits is 32000, while the sum is 34.

The spelling of 124255541221 in words is "one hundred twenty-four billion, two hundred fifty-five million, five hundred forty-one thousand, two hundred twenty-one".