201209915161 has 2 divisors, whose sum is σ = 201209915162. Its totient is φ = 201209915160.

The previous prime is 201209915143. The next prime is 201209915167. The reversal of 201209915161 is 161519902102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186067136025 + 15142779136 = 431355^2 + 123056^2 .

It is a cyclic number.

It is not a de Polignac number, because 201209915161 - 2¹³ = 201209906969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201209915161.

It is not a weakly prime, because it can be changed into another prime (201209915167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100604957580 + 100604957581.

It is an arithmetic number, because the mean of its divisors is an integer number (100604957581).

Almost surely, 2^201209915161 is an apocalyptic number.

It is an amenable number.

201209915161 is a deficient number, since it is larger than the sum of its proper divisors (1).

201209915161 is an equidigital number, since it uses as much as digits as its factorization.

201209915161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 37.

The spelling of 201209915161 in words is "two hundred one billion, two hundred nine million, nine hundred fifteen thousand, one hundred sixty-one".