22121122112 has 14 divisors (see below), whose sum is σ = 43896601818. Its totient is φ = 11060561024.

The previous prime is 22121122099. The next prime is 22121122141. The reversal of 22121122112 is 21122112122.

It can be written as a sum of positive squares in only one way, i.e., 12684165376 + 9436956736 = 112624^2 + 97144^2 .

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172821203 + ... + 172821330.

Almost surely, 2^22121122112 is an apocalyptic number.

It is an amenable number.

22121122112 is a deficient number, since it is larger than the sum of its proper divisors (21775479706).

22121122112 is an equidigital number, since it uses as much as digits as its factorization.

22121122112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345642545 (or 345642535 counting only the distinct ones).

The product of its digits is 64, while the sum is 17.

Adding to 22121122112 its reverse (21122112122), we get a palindrome (43243234234).

The spelling of 22121122112 in words is "twenty-two billion, one hundred twenty-one million, one hundred twenty-two thousand, one hundred twelve".