2111239872 has 504 divisors, whose sum is σ = 7709245440. Its totient is φ = 548674560.

The previous prime is 2111239861. The next prime is 2111239901. The reversal of 2111239872 is 2789321112.

It is a tau number, because it is divible by the number of its divisors (504).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

Its product of digits (12096) is a multiple of the sum of its prime divisors (189).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 16623873 + ... + 16623999.

Almost surely, 2^2111239872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2111239872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3854622720).

2111239872 is an abundant number, since it is smaller than the sum of its proper divisors (5598005568).

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

2111239872 is a wasteful number, since it uses less digits than its factorization.

2111239872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209 (or 189 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 2111239872 is about 45948.2303467718. The cubic root of 2111239872 is about 1282.8597907599.

The spelling of 2111239872 in words is "two billion, one hundred eleven million, two hundred thirty-nine thousand, eight hundred seventy-two".