2123110987 has 4 divisors (see below), whose sum is σ = 2129808816. Its totient is φ = 2116413160.

The previous prime is 2123110973. The next prime is 2123110991. The reversal of 2123110987 is 7890113212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2123110987 is a prime.

It is a super-2 number, since 2×2123110987² = 9015200526240228338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2123110937) 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, 3348439 + ... + 3349072.

It is an arithmetic number, because the mean of its divisors is an integer number (532452204).

Almost surely, 2^2123110987 is an apocalyptic number.

2123110987 is a deficient number, since it is larger than the sum of its proper divisors (6697829).

2123110987 is an equidigital number, since it uses as much as digits as its factorization.

2123110987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6697828.

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

The square root of 2123110987 is about 46077.2285082339. The cubic root of 2123110987 is about 1285.2597267548.

The spelling of 2123110987 in words is "two billion, one hundred twenty-three million, one hundred ten thousand, nine hundred eighty-seven".