22120122100 has 36 divisors (see below), whose sum is σ = 48441061900. Its totient is φ = 8766869760.

The previous prime is 22120122077. The next prime is 22120122113. The reversal of 22120122100 is 122102122.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 51236964 + 22068885136 = 7158^2 + 148556^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1003785 + ... + 1025584.

Almost surely, 2^22120122100 is an apocalyptic number.

22120122100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22120122100 is an abundant number, since it is smaller than the sum of its proper divisors (26320939800).

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

22120122100 is a wasteful number, since it uses less digits than its factorization.

22120122100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2029492 (or 2029485 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 22120122100 its reverse (122102122), we get a palindrome (22242224222).

The spelling of 22120122100 in words is "twenty-two billion, one hundred twenty million, one hundred twenty-two thousand, one hundred".