23021129 has 4 divisors (see below), whose sum is σ = 23298576. Its totient is φ = 22743684.

The previous prime is 23021101. The next prime is 23021147. The reversal of 23021129 is 92112032.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23021129 - 2²⁰ = 21972553 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 23021129.

It is not an unprimeable number, because it can be changed into a prime (23021149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138599 + ... + 138764.

It is an arithmetic number, because the mean of its divisors is an integer number (5824644).

Almost surely, 2^23021129 is an apocalyptic number.

It is an amenable number.

23021129 is a deficient number, since it is larger than the sum of its proper divisors (277447).

23021129 is an equidigital number, since it uses as much as digits as its factorization.

23021129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277446.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 23021129 is about 4798.0338681589. The cubic root of 23021129 is about 284.4737554849.

The spelling of 23021129 in words is "twenty-three million, twenty-one thousand, one hundred twenty-nine".