22431312221 has 8 divisors (see below), whose sum is σ = 22614820800. Its totient is φ = 22247989920.

The previous prime is 22431312199. The next prime is 22431312223. The reversal of 22431312221 is 12221313422.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22431312221 - 2⁶ = 22431312157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22431312223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200585 + ... + 291713.

It is an arithmetic number, because the mean of its divisors is an integer number (2826852600).

Almost surely, 2^22431312221 is an apocalyptic number.

It is an amenable number.

22431312221 is a deficient number, since it is larger than the sum of its proper divisors (183508579).

22431312221 is a wasteful number, since it uses less digits than its factorization.

22431312221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93139.

The product of its digits is 1152, while the sum is 23.

Adding to 22431312221 its reverse (12221313422), we get a palindrome (34652625643).

The spelling of 22431312221 in words is "twenty-two billion, four hundred thirty-one million, three hundred twelve thousand, two hundred twenty-one".