116911021 has 2 divisors, whose sum is σ = 116911022. Its totient is φ = 116911020.

The previous prime is 116911019. The next prime is 116911027. The reversal of 116911021 is 120119611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115670025 + 1240996 = 10755^2 + 1114^2 .

It is an emirp because it is prime and its reverse (120119611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 116911021 - 2¹ = 116911019 is a prime.

Together with 116911019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 116910983 and 116911001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (116911027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58455510 + 58455511.

It is an arithmetic number, because the mean of its divisors is an integer number (58455511).

Almost surely, 2^116911021 is an apocalyptic number.

It is an amenable number.

116911021 is a deficient number, since it is larger than the sum of its proper divisors (1).

116911021 is an equidigital number, since it uses as much as digits as its factorization.

116911021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 22.

The square root of 116911021 is about 10812.5399883654. The cubic root of 116911021 is about 488.9733063382.

The spelling of 116911021 in words is "one hundred sixteen million, nine hundred eleven thousand, twenty-one".