2111999986 has 8 divisors (see below), whose sum is σ = 3334736880. Its totient is φ = 1000421028.

The previous prime is 2111999977. The next prime is 2112000017. The reversal of 2111999986 is 6899991112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27789436 + ... + 27789511.

It is an arithmetic number, because the mean of its divisors is an integer number (416842110).

Almost surely, 2^2111999986 is an apocalyptic number.

2111999986 is a deficient number, since it is larger than the sum of its proper divisors (1222736894).

2111999986 is a wasteful number, since it uses less digits than its factorization.

2111999986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55578968.

The product of its digits is 629856, while the sum is 55.

The square root of 2111999986 is about 45956.5010199863. The cubic root of 2111999986 is about 1283.0137291634.

The spelling of 2111999986 in words is "two billion, one hundred eleven million, nine hundred ninety-nine thousand, nine hundred eighty-six".