117117712266221 has 2 divisors, whose sum is σ = 117117712266222. Its totient is φ = 117117712266220.

The previous prime is 117117712266209. The next prime is 117117712266239. The reversal of 117117712266221 is 122662217711711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116730845682025 + 386866584196 = 10804205^2 + 621986^2 .

It is an emirp because it is prime and its reverse (122662217711711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117117712266221 - 2¹⁸ = 117117712004077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117117712566221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58558856133110 + 58558856133111.

It is an arithmetic number, because the mean of its divisors is an integer number (58558856133111).

Almost surely, 2^{117117712266221} is an apocalyptic number.

It is an amenable number.

117117712266221 is a deficient number, since it is larger than the sum of its proper divisors (1).

117117712266221 is an equidigital number, since it uses as much as digits as its factorization.

117117712266221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 197568, while the sum is 47.

Adding to 117117712266221 its reverse (122662217711711), we get a palindrome (239779929977932).

The spelling of 117117712266221 in words is "one hundred seventeen trillion, one hundred seventeen billion, seven hundred twelve million, two hundred sixty-six thousand, two hundred twenty-one".