2120111904 has 48 divisors (see below), whose sum is σ = 5694730272. Its totient is φ = 690267648.

The previous prime is 2120111899. The next prime is 2120111921. The reversal of 2120111904 is 4091110212.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252669 + ... + 260924.

It is an arithmetic number, because the mean of its divisors is an integer number (118640214).

Almost surely, 2^2120111904 is an apocalyptic number.

2120111904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2120111904 is an abundant number, since it is smaller than the sum of its proper divisors (3574618368).

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

2120111904 is a wasteful number, since it uses less digits than its factorization.

2120111904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513649 (or 513641 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 2120111904 is about 46044.6729166361. The cubic root of 2120111904 is about 1284.6542603684.

The spelling of 2120111904 in words is "two billion, one hundred twenty million, one hundred eleven thousand, nine hundred four".