2111111988 has 24 divisors (see below), whose sum is σ = 4926743808. Its totient is φ = 703587456.

The previous prime is 2111111921. The next prime is 2111111993. The reversal of 2111111988 is 8891111112.

It is a happy number.

It is a congruent number.

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, 92220 + ... + 112812.

It is an arithmetic number, because the mean of its divisors is an integer number (205280992).

Almost surely, 2^2111111988 is an apocalyptic number.

It is an amenable number.

2111111988 is an abundant number, since it is smaller than the sum of its proper divisors (2815631820).

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

2111111988 is a wasteful number, since it uses less digits than its factorization.

2111111988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29143 (or 29141 counting only the distinct ones).

The product of its digits is 1152, while the sum is 33.

The square root of 2111111988 is about 45946.8387160640. The cubic root of 2111111988 is about 1282.8338880418.

The spelling of 2111111988 in words is "two billion, one hundred eleven million, one hundred eleven thousand, nine hundred eighty-eight".