2116211897 has 8 divisors (see below), whose sum is σ = 2123616096. Its totient is φ = 2108821792.

The previous prime is 2116211891. The next prime is 2116211917. The reversal of 2116211897 is 7981126112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2116211897 - 2⁸ = 2116211641 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2116211897.

It is not an unprimeable number, because it can be changed into a prime (2116211891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 359258 + ... + 365100.

It is an arithmetic number, because the mean of its divisors is an integer number (265452012).

Almost surely, 2^2116211897 is an apocalyptic number.

It is an amenable number.

2116211897 is a deficient number, since it is larger than the sum of its proper divisors (7404199).

2116211897 is an equidigital number, since it uses as much as digits as its factorization.

2116211897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7047.

The product of its digits is 12096, while the sum is 38.

The square root of 2116211897 is about 46002.3031706022. The cubic root of 2116211897 is about 1283.8660573411.

The spelling of 2116211897 in words is "two billion, one hundred sixteen million, two hundred eleven thousand, eight hundred ninety-seven".