23210033021 has 4 divisors (see below), whose sum is σ = 26525752032. Its totient is φ = 19894314012.

The previous prime is 23210033017. The next prime is 23210033057. The reversal of 23210033021 is 12033001232.

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 23210033021 - 2² = 23210033017 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 (23210030021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1657859495 + ... + 1657859508.

It is an arithmetic number, because the mean of its divisors is an integer number (6631438008).

Almost surely, 2^23210033021 is an apocalyptic number.

It is an amenable number.

23210033021 is a deficient number, since it is larger than the sum of its proper divisors (3315719011).

23210033021 is an equidigital number, since it uses as much as digits as its factorization.

23210033021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3315719010.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 23210033021 its reverse (12033001232), we get a palindrome (35243034253).

The spelling of 23210033021 in words is "twenty-three billion, two hundred ten million, thirty-three thousand, twenty-one".