23735642121 has 24 divisors (see below), whose sum is σ = 35043053760. Its totient is φ = 15476531616.

The previous prime is 23735642101. The next prime is 23735642123. The reversal of 23735642121 is 12124653732.

23735642121 is a `hidden beast` number, since 2 + 3 + 7 + 3 + 5 + 642 + 1 + 2 + 1 = 666.

It is not a de Polignac number, because 23735642121 - 2⁹ = 23735641609 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23735642123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8845 + ... + 218058.

It is an arithmetic number, because the mean of its divisors is an integer number (1460127240).

Almost surely, 2^23735642121 is an apocalyptic number.

It is an amenable number.

23735642121 is a deficient number, since it is larger than the sum of its proper divisors (11307411639).

23735642121 is a wasteful number, since it uses less digits than its factorization.

23735642121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227165 (or 227162 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

It can be divided in two parts, 23735 and 642121, that added together give a square (665856 = 816²).

The spelling of 23735642121 in words is "twenty-three billion, seven hundred thirty-five million, six hundred forty-two thousand, one hundred twenty-one".