201113161 has 2 divisors, whose sum is σ = 201113162. Its totient is φ = 201113160.

The previous prime is 201113153. The next prime is 201113183. The reversal of 201113161 is 161311102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187005625 + 14107536 = 13675^2 + 3756^2 .

It is a cyclic number.

It is not a de Polignac number, because 201113161 - 2³ = 201113153 is a prime.

It is not a weakly prime, because it can be changed into another prime (201113131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100556580 + 100556581.

It is an arithmetic number, because the mean of its divisors is an integer number (100556581).

Almost surely, 2^201113161 is an apocalyptic number.

It is an amenable number.

201113161 is a deficient number, since it is larger than the sum of its proper divisors (1).

201113161 is an equidigital number, since it uses as much as digits as its factorization.

201113161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 201113161 is about 14181.4371979712. The cubic root of 201113161 is about 585.8865084410.

Adding to 201113161 its reverse (161311102), we get a palindrome (362424263).

The spelling of 201113161 in words is "two hundred one million, one hundred thirteen thousand, one hundred sixty-one".