117212810161 has 2 divisors, whose sum is σ = 117212810162. Its totient is φ = 117212810160.

The previous prime is 117212810137. The next prime is 117212810171. The reversal of 117212810161 is 161018212711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112020743025 + 5192067136 = 334695^2 + 72056^2 .

It is a cyclic number.

It is not a de Polignac number, because 117212810161 - 2³¹ = 115065326513 is a prime.

It is not a weakly prime, because it can be changed into another prime (117212810171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58606405080 + 58606405081.

It is an arithmetic number, because the mean of its divisors is an integer number (58606405081).

Almost surely, 2^117212810161 is an apocalyptic number.

It is an amenable number.

117212810161 is a deficient number, since it is larger than the sum of its proper divisors (1).

117212810161 is an equidigital number, since it uses as much as digits as its factorization.

117212810161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 31.

The spelling of 117212810161 in words is "one hundred seventeen billion, two hundred twelve million, eight hundred ten thousand, one hundred sixty-one".