124277221157 has 4 divisors (see below), whose sum is σ = 124278492960. Its totient is φ = 124275949356.

The previous prime is 124277221129. The next prime is 124277221177. The reversal of 124277221157 is 751122772421.

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 124277221157 - 2¹⁴ = 124277204773 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 (124277221177) 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, 475907 + ... + 689232.

It is an arithmetic number, because the mean of its divisors is an integer number (31069623240).

Almost surely, 2^124277221157 is an apocalyptic number.

It is an amenable number.

124277221157 is a deficient number, since it is larger than the sum of its proper divisors (1271803).

124277221157 is a wasteful number, since it uses less digits than its factorization.

124277221157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271802.

The product of its digits is 109760, while the sum is 41.

Adding to 124277221157 its reverse (751122772421), we get a palindrome (875399993578).

The spelling of 124277221157 in words is "one hundred twenty-four billion, two hundred seventy-seven million, two hundred twenty-one thousand, one hundred fifty-seven".