122161217 has 4 divisors (see below), whose sum is σ = 123370836. Its totient is φ = 120951600.

The previous prime is 122161183. The next prime is 122161219. The reversal of 122161217 is 712161221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 712161221 = 79 ⋅9014699.

It can be written as a sum of positive squares in 2 ways, for example, as 55591936 + 66569281 = 7456^2 + 8159^2 .

It is a cyclic number.

It is not a de Polignac number, because 122161217 - 2⁶ = 122161153 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122161192 and 122161201.

It is not an unprimeable number, because it can be changed into a prime (122161219) 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, 604658 + ... + 604859.

It is an arithmetic number, because the mean of its divisors is an integer number (30842709).

Almost surely, 2^122161217 is an apocalyptic number.

It is an amenable number.

122161217 is a deficient number, since it is larger than the sum of its proper divisors (1209619).

122161217 is a wasteful number, since it uses less digits than its factorization.

122161217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209618.

The product of its digits is 336, while the sum is 23.

The square root of 122161217 is about 11052.6565584931. The cubic root of 122161217 is about 496.1859358067.

The spelling of 122161217 in words is "one hundred twenty-two million, one hundred sixty-one thousand, two hundred seventeen".