22121010325 has 6 divisors (see below), whose sum is σ = 27430052834. Its totient is φ = 17696808240.

The previous prime is 22121010323. The next prime is 22121010371. The reversal of 22121010325 is 52301012122.

It can be written as a sum of positive squares in 3 ways, for example, as 2972539441 + 19148470884 = 54521^2 + 138378^2 .

It is not a de Polignac number, because 22121010325 - 2¹ = 22121010323 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 (22121010323) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 442420182 + ... + 442420231.

Almost surely, 2^22121010325 is an apocalyptic number.

22121010325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22121010325 is a deficient number, since it is larger than the sum of its proper divisors (5309042509).

22121010325 is an equidigital number, since it uses as much as digits as its factorization.

22121010325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884840423 (or 884840418 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 22121010325 its reverse (52301012122), we get a palindrome (74422022447).

The spelling of 22121010325 in words is "twenty-two billion, one hundred twenty-one million, ten thousand, three hundred twenty-five".