123152442021 has 12 divisors (see below), whose sum is σ = 203299269472. Its totient is φ = 70372823976.

The previous prime is 123152442011. The next prime is 123152442029. The reversal of 123152442021 is 120244251321.

123152442021 is a `hidden beast` number, since 1 + 231 + 5 + 2 + 4 + 420 + 2 + 1 = 666.

It is not a de Polignac number, because 123152442021 - 2¹⁷ = 123152310949 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 (123152442029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 977400271 + ... + 977400396.

Almost surely, 2^123152442021 is an apocalyptic number.

It is an amenable number.

123152442021 is a deficient number, since it is larger than the sum of its proper divisors (80146827451).

123152442021 is a wasteful number, since it uses less digits than its factorization.

123152442021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1954800680 (or 1954800677 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 123152442021 its reverse (120244251321), we get a palindrome (243396693342).

The spelling of 123152442021 in words is "one hundred twenty-three billion, one hundred fifty-two million, four hundred forty-two thousand, twenty-one".