23519952121 has 8 divisors (see below), whose sum is σ = 23659503104. Its totient is φ = 23380812000.

The previous prime is 23519952109. The next prime is 23519952143. The reversal of 23519952121 is 12125991532.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23519952121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23219952121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12496 + ... + 217246.

It is an arithmetic number, because the mean of its divisors is an integer number (2957437888).

Almost surely, 2^23519952121 is an apocalyptic number.

It is an amenable number.

23519952121 is a deficient number, since it is larger than the sum of its proper divisors (139550983).

23519952121 is a wasteful number, since it uses less digits than its factorization.

23519952121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205431.

The product of its digits is 48600, while the sum is 40.

The spelling of 23519952121 in words is "twenty-three billion, five hundred nineteen million, nine hundred fifty-two thousand, one hundred twenty-one".