2116392921 has 32 divisors (see below), whose sum is σ = 3186512640. Its totient is φ = 1388016000.

The previous prime is 2116392913. The next prime is 2116392923. The reversal of 2116392921 is 1292936112.

2116392921 is a `hidden beast` number, since 2 + 11 + 639 + 2 + 9 + 2 + 1 = 666.

It is not a de Polignac number, because 2116392921 - 2³ = 2116392913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2116392923) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1174221 + ... + 1176021.

It is an arithmetic number, because the mean of its divisors is an integer number (99578520).

Almost surely, 2^2116392921 is an apocalyptic number.

It is an amenable number.

2116392921 is a deficient number, since it is larger than the sum of its proper divisors (1070119719).

2116392921 is a wasteful number, since it uses less digits than its factorization.

2116392921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2494 (or 2488 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 2116392921 is about 46004.2706821878. The cubic root of 2116392921 is about 1283.9026642522.

The spelling of 2116392921 in words is "two billion, one hundred sixteen million, three hundred ninety-two thousand, nine hundred twenty-one".