120216555161 has 2 divisors, whose sum is σ = 120216555162. Its totient is φ = 120216555160.

The previous prime is 120216555097. The next prime is 120216555211. The reversal of 120216555161 is 161555612021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93059163136 + 27157392025 = 305056^2 + 164795^2 .

It is a cyclic number.

It is not a de Polignac number, because 120216555161 - 2⁶ = 120216555097 is a prime.

It is not a weakly prime, because it can be changed into another prime (120216555461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60108277580 + 60108277581.

It is an arithmetic number, because the mean of its divisors is an integer number (60108277581).

Almost surely, 2^120216555161 is an apocalyptic number.

It is an amenable number.

120216555161 is a deficient number, since it is larger than the sum of its proper divisors (1).

120216555161 is an equidigital number, since it uses as much as digits as its factorization.

120216555161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18000, while the sum is 35.

The spelling of 120216555161 in words is "one hundred twenty billion, two hundred sixteen million, five hundred fifty-five thousand, one hundred sixty-one".