22012020100 has 54 divisors (see below), whose sum is σ = 55564640250. Its totient is φ = 7546976640.

The previous prime is 22012020089. The next prime is 22012020113. The reversal of 22012020100 is 102021022.

It can be written as a sum of positive squares in 3 ways, for example, as 3963709764 + 18048310336 = 62958^2 + 134344^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2241225 + ... + 2251024.

Almost surely, 2^22012020100 is an apocalyptic number.

22012020100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22012020100 is an abundant number, since it is smaller than the sum of its proper divisors (33552620150).

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

22012020100 is a wasteful number, since it uses less digits than its factorization.

22012020100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4492277 (or 4492263 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 22012020100 its reverse (102021022), we get a palindrome (22114041122).

The spelling of 22012020100 in words is "twenty-two billion, twelve million, twenty thousand, one hundred".