2109918211 has 2 divisors, whose sum is σ = 2109918212. Its totient is φ = 2109918210.

The previous prime is 2109918193. The next prime is 2109918221. The reversal of 2109918211 is 1128199012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2109918211 - 2²³ = 2101529603 is a prime.

It is not a weakly prime, because it can be changed into another prime (2109918221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1054959105 + 1054959106.

It is an arithmetic number, because the mean of its divisors is an integer number (1054959106).

Almost surely, 2^2109918211 is an apocalyptic number.

2109918211 is a deficient number, since it is larger than the sum of its proper divisors (1).

2109918211 is an equidigital number, since it uses as much as digits as its factorization.

2109918211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 34.

The square root of 2109918211 is about 45933.8460288272. The cubic root of 2109918211 is about 1282.5920397728.

The spelling of 2109918211 in words is "two billion, one hundred nine million, nine hundred eighteen thousand, two hundred eleven".