23222212421 has 4 divisors (see below), whose sum is σ = 23222557644. Its totient is φ = 23221867200.

The previous prime is 23222212397. The next prime is 23222212423. The reversal of 23222212421 is 12421222232.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7927943521 + 15294268900 = 89039^2 + 123670^2 .

It is a cyclic number.

It is not a de Polignac number, because 23222212421 - 2¹⁸ = 23221950277 is a prime.

It is a super-2 number, since 2×23222212421² (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 (23222212423) 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 3 ways as a sum of consecutive naturals, for example, 35300 + ... + 218381.

It is an arithmetic number, because the mean of its divisors is an integer number (5805639411).

Almost surely, 2^23222212421 is an apocalyptic number.

It is an amenable number.

23222212421 is a deficient number, since it is larger than the sum of its proper divisors (345223).

23222212421 is an equidigital number, since it uses as much as digits as its factorization.

23222212421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345222.

The product of its digits is 1536, while the sum is 23.

Adding to 23222212421 its reverse (12421222232), we get a palindrome (35643434653).

The spelling of 23222212421 in words is "twenty-three billion, two hundred twenty-two million, two hundred twelve thousand, four hundred twenty-one".