2120111992 has 16 divisors (see below), whose sum is σ = 3981704040. Its totient is φ = 1058324256.

The previous prime is 2120111923. The next prime is 2120111993. The reversal of 2120111992 is 2991110212.

It is a self number, because there is not a number n which added to its sum of digits gives 2120111992.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120111993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211258 + ... + 221065.

Almost surely, 2^2120111992 is an apocalyptic number.

It is an amenable number.

2120111992 is a deficient number, since it is larger than the sum of its proper divisors (1861592048).

2120111992 is a wasteful number, since it uses less digits than its factorization.

2120111992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432942 (or 432938 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 2120111992 is about 46044.6738722298. The cubic root of 2120111992 is about 1284.6542781426.

The spelling of 2120111992 in words is "two billion, one hundred twenty million, one hundred eleven thousand, nine hundred ninety-two".