21222022122112 has 96 divisors (see below), whose sum is σ = 49667758443540. Its totient is φ = 9005101056000.

The previous prime is 21222022122107. The next prime is 21222022122113. The reversal of 21222022122112 is 21122122022212.

It can be written as a sum of positive squares in 2 ways, for example, as 17242890831936 + 3979131290176 = 4152456^2 + 1994776^2 .

It is a super-2 number, since 2×21222022122112² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21222022122113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16117089 + ... + 17384032.

Almost surely, 2^{21222022122112} is an apocalyptic number.

It is an amenable number.

21222022122112 is an abundant number, since it is smaller than the sum of its proper divisors (28445736321428).

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

21222022122112 is a wasteful number, since it uses less digits than its factorization.

21222022122112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33501250 (or 33501231 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 21222022122112 its reverse (21122122022212), we get a palindrome (42344144144324).

The spelling of 21222022122112 in words is "twenty-one trillion, two hundred twenty-two billion, twenty-two million, one hundred twenty-two thousand, one hundred twelve".