124122240021 has 16 divisors (see below), whose sum is σ = 181589579136. Its totient is φ = 74941728576.

The previous prime is 124122240017. The next prime is 124122240041. The reversal of 124122240021 is 120042221421.

It is not a de Polignac number, because 124122240021 - 2² = 124122240017 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 124122240021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124122240001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30022665 + ... + 30026798.

It is an arithmetic number, because the mean of its divisors is an integer number (11349348696).

Almost surely, 2^124122240021 is an apocalyptic number.

It is an amenable number.

124122240021 is a deficient number, since it is larger than the sum of its proper divisors (57467339115).

124122240021 is a wasteful number, since it uses less digits than its factorization.

124122240021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60049532.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 124122240021 its reverse (120042221421), we get a palindrome (244164461442).

The spelling of 124122240021 in words is "one hundred twenty-four billion, one hundred twenty-two million, two hundred forty thousand, twenty-one".