2100245100 has 72 divisors (see below), whose sum is σ = 6081308688. Its totient is φ = 559641600.

The previous prime is 2100245053. The next prime is 2100245137. The reversal of 2100245100 is 15420012.

It is a super-2 number, since 2×2100245100² = 8822058960148020000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 2100245100.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 754912 + ... + 757688.

Almost surely, 2^2100245100 is an apocalyptic number.

2100245100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2100245100 is an abundant number, since it is smaller than the sum of its proper divisors (3981063588).

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

2100245100 is a wasteful number, since it uses less digits than its factorization.

2100245100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5315 (or 5308 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 2100245100 is about 45828.4311317767. The cubic root of 2100245100 is about 1280.6289836769.

Adding to 2100245100 its reverse (15420012), we get a palindrome (2115665112).

The spelling of 2100245100 in words is "two billion, one hundred million, two hundred forty-five thousand, one hundred".