2100421100 has 18 divisors (see below), whose sum is σ = 4557914004. Its totient is φ = 840168400.

The previous prime is 2100421087. The next prime is 2100421159. The reversal of 2100421100 is 11240012.

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, 10502006 + ... + 10502205.

Almost surely, 2^2100421100 is an apocalyptic number.

2100421100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2100421100 is an abundant number, since it is smaller than the sum of its proper divisors (2457492904).

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

2100421100 is a wasteful number, since it uses less digits than its factorization.

2100421100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21004225 (or 21004218 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 2100421100 is about 45830.3512969299. The cubic root of 2100421100 is about 1280.6647548043.

Adding to 2100421100 its reverse (11240012), we get a palindrome (2111661112).

The spelling of 2100421100 in words is "two billion, one hundred million, four hundred twenty-one thousand, one hundred".