2112023991 has 32 divisors (see below), whose sum is σ = 3592562688. Its totient is φ = 1071635040.

The previous prime is 2112023981. The next prime is 2112023993. The reversal of 2112023991 is 1993202112.

It is not a de Polignac number, because 2112023991 - 2¹⁴ = 2112007607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112023993) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96381 + ... + 116246.

It is an arithmetic number, because the mean of its divisors is an integer number (112267584).

Almost surely, 2^2112023991 is an apocalyptic number.

2112023991 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2112023991 is a deficient number, since it is larger than the sum of its proper divisors (1480538697).

2112023991 is a wasteful number, since it uses less digits than its factorization.

2112023991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212691.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 2112023991 is about 45956.7621901282. The cubic root of 2112023991 is about 1283.0185900580.

It can be divided in two parts, 211 and 2023991, that added together give a palindrome (2024202).

The spelling of 2112023991 in words is "two billion, one hundred twelve million, twenty-three thousand, nine hundred ninety-one".