2100120090 has 16 divisors (see below), whose sum is σ = 5040288288. Its totient is φ = 560032016.

The previous prime is 2100120089. The next prime is 2100120107. The reversal of 2100120090 is 900210012.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35001972 + ... + 35002031.

It is an arithmetic number, because the mean of its divisors is an integer number (315018018).

Almost surely, 2^2100120090 is an apocalyptic number.

2100120090 is an abundant number, since it is smaller than the sum of its proper divisors (2940168198).

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

2100120090 is a wasteful number, since it uses less digits than its factorization.

2100120090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70004013.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 2100120090 is about 45827.0672201484. The cubic root of 2100120090 is about 1280.6035748003.

The spelling of 2100120090 in words is "two billion, one hundred million, one hundred twenty thousand, ninety".