2112120987 has 32 divisors (see below), whose sum is σ = 3092424192. Its totient is φ = 1276798464.

The previous prime is 2112120979. The next prime is 2112121007. The reversal of 2112120987 is 7890212112.

It is not a de Polignac number, because 2112120987 - 2³ = 2112120979 is a prime.

It is a super-2 number, since 2×2112120987² = 8922110127451708338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2112120937) 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, 188928 + ... + 199794.

It is an arithmetic number, because the mean of its divisors is an integer number (96638256).

Almost surely, 2^2112120987 is an apocalyptic number.

2112120987 is a deficient number, since it is larger than the sum of its proper divisors (980303205).

2112120987 is a wasteful number, since it uses less digits than its factorization.

2112120987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11027.

The product of its (nonzero) digits is 4032, while the sum is 33.

The square root of 2112120987 is about 45957.8174742883. The cubic root of 2112120987 is about 1283.0382308964.

The spelling of 2112120987 in words is "two billion, one hundred twelve million, one hundred twenty thousand, nine hundred eighty-seven".