2021200900 has 36 divisors (see below), whose sum is σ = 4576707072. Its totient is φ = 773328160.

The previous prime is 2021200879. The next prime is 2021200913. The reversal of 2021200900 is 90021202.

It is a happy 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, 437092 + ... + 441691.

It is an arithmetic number, because the mean of its divisors is an integer number (127130752).

Almost surely, 2^2021200900 is an apocalyptic number.

2021200900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021200900 is an abundant number, since it is smaller than the sum of its proper divisors (2555506172).

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

2021200900 is a wasteful number, since it uses less digits than its factorization.

2021200900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878820 (or 878813 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2021200900 is about 44957.7679606094. The cubic root of 2021200900 is about 1264.3573211670.

The spelling of 2021200900 in words is "two billion, twenty-one million, two hundred thousand, nine hundred".