117126221 has 2 divisors, whose sum is σ = 117126222. Its totient is φ = 117126220.

The previous prime is 117126199. The next prime is 117126223. The reversal of 117126221 is 122621711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115885225 + 1240996 = 10765^2 + 1114^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117126221 is a prime.

It is a Sophie Germain prime.

Together with 117126223, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117126223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58563110 + 58563111.

It is an arithmetic number, because the mean of its divisors is an integer number (58563111).

Almost surely, 2^117126221 is an apocalyptic number.

It is an amenable number.

117126221 is a deficient number, since it is larger than the sum of its proper divisors (1).

117126221 is an equidigital number, since it uses as much as digits as its factorization.

117126221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336, while the sum is 23.

The square root of 117126221 is about 10822.4868214288. The cubic root of 117126221 is about 489.2731427899.

Adding to 117126221 its reverse (122621711), we get a palindrome (239747932).

The spelling of 117126221 in words is "one hundred seventeen million, one hundred twenty-six thousand, two hundred twenty-one".