23202012021 has 4 divisors (see below), whose sum is σ = 30936016032. Its totient is φ = 15468008012.

The previous prime is 23202011981. The next prime is 23202012061. The reversal of 23202012021 is 12021020232.

It is a happy number.

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 an interprime number because it is at equal distance from previous prime (23202011981) and next prime (23202012061).

It is a cyclic number.

It is not a de Polignac number, because 23202012021 - 2⁶ = 23202011957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23202012061) 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, 3867002001 + ... + 3867002006.

It is an arithmetic number, because the mean of its divisors is an integer number (7734004008).

Almost surely, 2^23202012021 is an apocalyptic number.

It is an amenable number.

23202012021 is a deficient number, since it is larger than the sum of its proper divisors (7734004011).

23202012021 is an equidigital number, since it uses as much as digits as its factorization.

23202012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7734004010.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 23202012021 its reverse (12021020232), we get a palindrome (35223032253).

The spelling of 23202012021 in words is "twenty-three billion, two hundred two million, twelve thousand, twenty-one".