23231201021 has 16 divisors (see below), whose sum is σ = 27002640768. Its totient is φ = 19573358400.

The previous prime is 23231201017. The next prime is 23231201039. The reversal of 23231201021 is 12010213232.

It is a cyclic number.

It is not a de Polignac number, because 23231201021 - 2² = 23231201017 is a prime.

It is a super-2 number, since 2×23231201021² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23231201051) 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, 675386 + ... + 708948.

It is an arithmetic number, because the mean of its divisors is an integer number (1687665048).

Almost surely, 2^23231201021 is an apocalyptic number.

It is an amenable number.

23231201021 is a deficient number, since it is larger than the sum of its proper divisors (3771439747).

23231201021 is a wasteful number, since it uses less digits than its factorization.

23231201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35252.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 23231201021 its reverse (12010213232), we get a palindrome (35241414253).

The spelling of 23231201021 in words is "twenty-three billion, two hundred thirty-one million, two hundred one thousand, twenty-one".