23122202421 has 16 divisors (see below), whose sum is σ = 30980600000. Its totient is φ = 15339483648.

The previous prime is 23122202387. The next prime is 23122202443. The reversal of 23122202421 is 12420222132.

It is not a de Polignac number, because 23122202421 - 2¹⁰ = 23122201397 is a prime.

It is a super-2 number, since 2×23122202421² (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 (23122202491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 500325 + ... + 544581.

It is an arithmetic number, because the mean of its divisors is an integer number (1936287500).

Almost surely, 2^23122202421 is an apocalyptic number.

It is an amenable number.

23122202421 is a deficient number, since it is larger than the sum of its proper divisors (7858397579).

23122202421 is a wasteful number, since it uses less digits than its factorization.

23122202421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45108.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 23122202421 its reverse (12420222132), we get a palindrome (35542424553).

The spelling of 23122202421 in words is "twenty-three billion, one hundred twenty-two million, two hundred two thousand, four hundred twenty-one".