23021202421 has 16 divisors (see below), whose sum is σ = 26757751680. Its totient is φ = 19397004480.

The previous prime is 23021202419. The next prime is 23021202433. The reversal of 23021202421 is 12420212032.

It is not a de Polignac number, because 23021202421 - 2¹ = 23021202419 is a prime.

It is a super-2 number, since 2×23021202421² (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 (23021202121) 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, 713970 + ... + 745516.

It is an arithmetic number, because the mean of its divisors is an integer number (1672359480).

Almost surely, 2^23021202421 is an apocalyptic number.

It is an amenable number.

23021202421 is a deficient number, since it is larger than the sum of its proper divisors (3736549259).

23021202421 is a wasteful number, since it uses less digits than its factorization.

23021202421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33324.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 23021202421 its reverse (12420212032), we get a palindrome (35441414453).

The spelling of 23021202421 in words is "twenty-three billion, twenty-one million, two hundred two thousand, four hundred twenty-one".