2100990120 has 32 divisors (see below), whose sum is σ = 6302970720. Its totient is φ = 560264000.

The previous prime is 2100990107. The next prime is 2100990127. The reversal of 2100990120 is 210990012.

It is a super-2 number, since 2×2100990120² = 8828318968675228800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (2100990127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8754006 + ... + 8754245.

It is an arithmetic number, because the mean of its divisors is an integer number (196967835).

Almost surely, 2^2100990120 is an apocalyptic number.

2100990120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2100990120 is an abundant number, since it is smaller than the sum of its proper divisors (4201980600).

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

2100990120 is a wasteful number, since it uses less digits than its factorization.

2100990120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17508265 (or 17508261 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 2100990120 is about 45836.5587713563. The cubic root of 2100990120 is about 1280.7803916264.

The spelling of 2100990120 in words is "two billion, one hundred million, nine hundred ninety thousand, one hundred twenty".