2113120987 has 16 divisors (see below), whose sum is σ = 2190021120. Its totient is φ = 2037694752.

The previous prime is 2113120963. The next prime is 2113121027. The reversal of 2113120987 is 7890213112.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2113120987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2113120907) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2859064 + ... + 2859802.

It is an arithmetic number, because the mean of its divisors is an integer number (136876320).

Almost surely, 2^2113120987 is an apocalyptic number.

2113120987 is a deficient number, since it is larger than the sum of its proper divisors (76900133).

2113120987 is an equidigital number, since it uses as much as digits as its factorization.

2113120987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1602.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 2113120987 is about 45968.6957287239. The cubic root of 2113120987 is about 1283.2406870695.

The spelling of 2113120987 in words is "two billion, one hundred thirteen million, one hundred twenty thousand, nine hundred eighty-seven".