101156161 has 4 divisors (see below), whose sum is σ = 101390212. Its totient is φ = 100922112.

The previous prime is 101156129. The next prime is 101156177. The reversal of 101156161 is 161651101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 161651101 = 67 ⋅2412703.

It can be written as a sum of positive squares in 2 ways, for example, as 27625536 + 73530625 = 5256^2 + 8575^2 .

It is a cyclic number.

It is not a de Polignac number, because 101156161 - 2⁵ = 101156129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101151161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116376 + ... + 117241.

It is an arithmetic number, because the mean of its divisors is an integer number (25347553).

Almost surely, 2^101156161 is an apocalyptic number.

It is an amenable number.

101156161 is a deficient number, since it is larger than the sum of its proper divisors (234051).

101156161 is an equidigital number, since it uses as much as digits as its factorization.

101156161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234050.

The product of its (nonzero) digits is 180, while the sum is 22.

The square root of 101156161 is about 10057.6419204503. The cubic root of 101156161 is about 465.9408414651.

The spelling of 101156161 in words is "one hundred one million, one hundred fifty-six thousand, one hundred sixty-one".