123227161 has 4 divisors (see below), whose sum is σ = 123621172. Its totient is φ = 122833152.

The previous prime is 123227113. The next prime is 123227183. The reversal of 123227161 is 161722321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 161722321 = 811 ⋅199411.

It can be written as a sum of positive squares in 2 ways, for example, as 571536 + 122655625 = 756^2 + 11075^2 .

It is a cyclic number.

It is not a de Polignac number, because 123227161 - 2²⁵ = 89672729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123222161) 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, 196536 + ... + 197161.

It is an arithmetic number, because the mean of its divisors is an integer number (30905293).

Almost surely, 2^123227161 is an apocalyptic number.

It is an amenable number.

123227161 is a deficient number, since it is larger than the sum of its proper divisors (394011).

123227161 is an equidigital number, since it uses as much as digits as its factorization.

123227161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394010.

The product of its digits is 1008, while the sum is 25.

The square root of 123227161 is about 11100.7729911029. The cubic root of 123227161 is about 497.6249508125.

Adding to 123227161 its reverse (161722321), we get a palindrome (284949482).

The spelling of 123227161 in words is "one hundred twenty-three million, two hundred twenty-seven thousand, one hundred sixty-one".