23121099 has 16 divisors (see below), whose sum is σ = 34406400. Its totient is φ = 15345288.

The previous prime is 23121073. The next prime is 23121101. The reversal of 23121099 is 99012132.

It is not a de Polignac number, because 23121099 - 2¹¹ = 23119051 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (23121899) 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, 4662 + ... + 8244.

It is an arithmetic number, because the mean of its divisors is an integer number (2150400).

Almost surely, 2^23121099 is an apocalyptic number.

23121099 is a deficient number, since it is larger than the sum of its proper divisors (11285301).

23121099 is a wasteful number, since it uses less digits than its factorization.

23121099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3831 (or 3825 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 23121099 is about 4808.4403916447. The cubic root of 23121099 is about 284.8849397037.

The spelling of 23121099 in words is "twenty-three million, one hundred twenty-one thousand, ninety-nine".