210020100 has 36 divisors (see below), whose sum is σ = 607659024. Its totient is φ = 56005280.

The previous prime is 210020087. The next prime is 210020101. The reversal of 210020100 is 1020012.

It is a happy number.

210020100 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is not an unprimeable number, because it can be changed into a prime (210020101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 349734 + ... + 350333.

Almost surely, 2^210020100 is an apocalyptic number.

210020100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210020100 is an abundant number, since it is smaller than the sum of its proper divisors (397638924).

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

210020100 is a wasteful number, since it uses less digits than its factorization.

210020100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700084 (or 700077 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 6.

The square root of 210020100 is about 14492.0702454825. The cubic root of 210020100 is about 594.4111586128.

Adding to 210020100 its reverse (1020012), we get a palindrome (211040112).

The spelling of 210020100 in words is "two hundred ten million, twenty thousand, one hundred".