2100210000100 has 18 divisors (see below), whose sum is σ = 4557455700434. Its totient is φ = 840084000000.

The previous prime is 2100210000067. The next prime is 2100210000193. The reversal of 2100210000100 is 10000120012.

It can be written as a sum of positive squares in 3 ways, for example, as 78700447296 + 2021509552804 = 280536^2 + 1421798^2 .

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, 10501049901 + ... + 10501050100.

Almost surely, 2^{2100210000100} is an apocalyptic number.

2100210000100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2100210000100 is an abundant number, since it is smaller than the sum of its proper divisors (2457245700334).

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

2100210000100 is a wasteful number, since it uses less digits than its factorization.

2100210000100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21002100015 (or 21002100008 counting only the distinct ones).

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

Adding to 2100210000100 its reverse (10000120012), we get a palindrome (2110210120112).

The spelling of 2100210000100 in words is "two trillion, one hundred billion, two hundred ten million, one hundred", and thus it is an aban number.