116216621 has 2 divisors, whose sum is σ = 116216622. Its totient is φ = 116216620.

The previous prime is 116216609. The next prime is 116216623. The reversal of 116216621 is 126612611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61011721 + 55204900 = 7811^2 + 7430^2 .

It is an emirp because it is prime and its reverse (126612611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 116216621 - 2¹⁰ = 116215597 is a prime.

Together with 116216623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (116216623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58108310 + 58108311.

It is an arithmetic number, because the mean of its divisors is an integer number (58108311).

Almost surely, 2^116216621 is an apocalyptic number.

It is an amenable number.

116216621 is a deficient number, since it is larger than the sum of its proper divisors (1).

116216621 is an equidigital number, since it uses as much as digits as its factorization.

116216621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 26.

The square root of 116216621 is about 10780.3813012342. The cubic root of 116216621 is about 488.0032879045.

The spelling of 116216621 in words is "one hundred sixteen million, two hundred sixteen thousand, six hundred twenty-one".