101272161 has 4 divisors (see below), whose sum is σ = 135029552. Its totient is φ = 67514772.

The previous prime is 101272159. The next prime is 101272177. The reversal of 101272161 is 161272101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 101272161 - 2¹ = 101272159 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101272141) 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, 16878691 + ... + 16878696.

It is an arithmetic number, because the mean of its divisors is an integer number (33757388).

Almost surely, 2^101272161 is an apocalyptic number.

It is an amenable number.

101272161 is a deficient number, since it is larger than the sum of its proper divisors (33757391).

101272161 is an equidigital number, since it uses as much as digits as its factorization.

101272161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33757390.

The product of its (nonzero) digits is 168, while the sum is 21.

The square root of 101272161 is about 10063.4070274435. The cubic root of 101272161 is about 466.1188780444.

The spelling of 101272161 in words is "one hundred one million, two hundred seventy-two thousand, one hundred sixty-one".