20212200100 has 18 divisors (see below), whose sum is σ = 43860474434. Its totient is φ = 8084880000.

The previous prime is 20212200097. The next prime is 20212200139. The reversal of 20212200100 is 100221202.

It can be written as a sum of positive squares in 3 ways, for example, as 178062336 + 20034137764 = 13344^2 + 141542^2 .

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 5 ways as a sum of consecutive naturals, for example, 101060901 + ... + 101061100.

Almost surely, 2^20212200100 is an apocalyptic number.

20212200100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20212200100 is an abundant number, since it is smaller than the sum of its proper divisors (23648274334).

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

20212200100 is a wasteful number, since it uses less digits than its factorization.

20212200100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202122015 (or 202122008 counting only the distinct ones).

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

Adding to 20212200100 its reverse (100221202), we get a palindrome (20312421302).

The spelling of 20212200100 in words is "twenty billion, two hundred twelve million, two hundred thousand, one hundred".