2117114891 has 2 divisors, whose sum is σ = 2117114892. Its totient is φ = 2117114890.

The previous prime is 2117114887. The next prime is 2117114911. The reversal of 2117114891 is 1984117112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2117114891 - 2² = 2117114887 is a prime.

It is a super-3 number, since 3×2117114891³ (a number of 29 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (2117114801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1058557445 + 1058557446.

It is an arithmetic number, because the mean of its divisors is an integer number (1058557446).

Almost surely, 2^2117114891 is an apocalyptic number.

2117114891 is a deficient number, since it is larger than the sum of its proper divisors (1).

2117114891 is an equidigital number, since it uses as much as digits as its factorization.

2117114891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 35.

The square root of 2117114891 is about 46012.1167846036. The cubic root of 2117114891 is about 1284.0486412136.

The spelling of 2117114891 in words is "two billion, one hundred seventeen million, one hundred fourteen thousand, eight hundred ninety-one".