22512314221 has 4 divisors (see below), whose sum is σ = 22610621500. Its totient is φ = 22414006944.

The previous prime is 22512314207. The next prime is 22512314269. The reversal of 22512314221 is 12241321522.

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 21631055625 + 881258596 = 147075^2 + 29686^2 .

It is a cyclic number.

It is not a de Polignac number, because 22512314221 - 2⁵ = 22512314189 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 (22512314921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49153296 + ... + 49153753.

It is an arithmetic number, because the mean of its divisors is an integer number (5652655375).

Almost surely, 2^22512314221 is an apocalyptic number.

It is an amenable number.

22512314221 is a deficient number, since it is larger than the sum of its proper divisors (98307279).

22512314221 is an equidigital number, since it uses as much as digits as its factorization.

22512314221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98307278.

The product of its digits is 1920, while the sum is 25.

Adding to 22512314221 its reverse (12241321522), we get a palindrome (34753635743).

The spelling of 22512314221 in words is "twenty-two billion, five hundred twelve million, three hundred fourteen thousand, two hundred twenty-one".