20212100200 has 48 divisors (see below), whose sum is σ = 47143416780. Its totient is φ = 8058984960.

The previous prime is 20212100197. The next prime is 20212100213. The reversal of 20212100200 is 200121202.

It can be written as a sum of positive squares in 6 ways, for example, as 488144836 + 19723955364 = 22094^2 + 140442^2 .

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 11 ways as a sum of consecutive naturals, for example, 98839 + ... + 224038.

Almost surely, 2^20212100200 is an apocalyptic number.

20212100200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20212100200 is an abundant number, since it is smaller than the sum of its proper divisors (26931316580).

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

20212100200 is a wasteful number, since it uses less digits than its factorization.

20212100200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323206 (or 323197 counting only the distinct ones).

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

Adding to 20212100200 its reverse (200121202), we get a palindrome (20412221402).

The spelling of 20212100200 in words is "twenty billion, two hundred twelve million, one hundred thousand, two hundred".