23233021021 has 16 divisors (see below), whose sum is σ = 27413987328. Its totient is φ = 19267801200.

The previous prime is 23233020989. The next prime is 23233021061. The reversal of 23233021021 is 12012033232.

It is a cyclic number.

It is not a de Polignac number, because 23233021021 - 2⁵ = 23233020989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23233021021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23233021061) 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, 1766556 + ... + 1779658.

It is an arithmetic number, because the mean of its divisors is an integer number (1713374208).

Almost surely, 2^23233021021 is an apocalyptic number.

It is an amenable number.

23233021021 is a deficient number, since it is larger than the sum of its proper divisors (4180966307).

23233021021 is a wasteful number, since it uses less digits than its factorization.

23233021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21312.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 23233021021 its reverse (12012033232), we get a palindrome (35245054253).

The spelling of 23233021021 in words is "twenty-three billion, two hundred thirty-three million, twenty-one thousand, twenty-one".