202100100100 has 18 divisors (see below), whose sum is σ = 438557217434. Its totient is φ = 80840040000.

The previous prime is 202100100089. The next prime is 202100100119. The reversal of 202100100100 is 1001001202.

It can be written as a sum of positive squares in 3 ways, for example, as 57322894084 + 144777206016 = 239422^2 + 380496^2 .

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, 1010500401 + ... + 1010500600.

Almost surely, 2^202100100100 is an apocalyptic number.

202100100100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202100100100 is an abundant number, since it is smaller than the sum of its proper divisors (236457117334).

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

202100100100 is a wasteful number, since it uses less digits than its factorization.

202100100100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2021001015 (or 2021001008 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 202100100100 its reverse (1001001202), we get a palindrome (203101101302).

The spelling of 202100100100 in words is "two hundred two billion, one hundred million, one hundred thousand, one hundred".