2120219990 has 32 divisors (see below), whose sum is σ = 4377729024. Its totient is φ = 724243680.

The previous prime is 2120219989. The next prime is 2120220023. The reversal of 2120219990 is 999120212.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2120219990.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36914 + ... + 74853.

It is an arithmetic number, because the mean of its divisors is an integer number (136804032).

Almost surely, 2^2120219990 is an apocalyptic number.

2120219990 is an abundant number, since it is smaller than the sum of its proper divisors (2257509034).

2120219990 is a wasteful number, since it uses less digits than its factorization.

2120219990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112052.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 2120219990 is about 46045.8466096563. The cubic root of 2120219990 is about 1284.6760910998.

The spelling of 2120219990 in words is "two billion, one hundred twenty million, two hundred nineteen thousand, nine hundred ninety".