22120172112 has 40 divisors (see below), whose sum is σ = 57507770656. Its totient is φ = 7326423936.

The previous prime is 22120172111. The next prime is 22120172117. The reversal of 22120172112 is 21127102122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22120172111) 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, 1460098 + ... + 1475169.

Almost surely, 2^22120172112 is an apocalyptic number.

It is an amenable number.

22120172112 is an abundant number, since it is smaller than the sum of its proper divisors (35387598544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22120172112 is a wasteful number, since it uses less digits than its factorization.

22120172112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2935435 (or 2935429 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 21.

Adding to 22120172112 its reverse (21127102122), we get a palindrome (43247274234).

The spelling of 22120172112 in words is "twenty-two billion, one hundred twenty million, one hundred seventy-two thousand, one hundred twelve".