122147217 has 32 divisors (see below), whose sum is σ = 188236800. Its totient is φ = 78188544.

The previous prime is 122147209. The next prime is 122147239. The reversal of 122147217 is 712741221.

It is a happy number.

It is not a de Polignac number, because 122147217 - 2³ = 122147209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (122147297) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 200928 + ... + 201534.

It is an arithmetic number, because the mean of its divisors is an integer number (5882400).

Almost surely, 2^122147217 is an apocalyptic number.

It is an amenable number.

122147217 is a deficient number, since it is larger than the sum of its proper divisors (66089583).

122147217 is a wasteful number, since it uses less digits than its factorization.

122147217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902 (or 896 counting only the distinct ones).

The product of its digits is 1568, while the sum is 27.

The square root of 122147217 is about 11052.0232084447. The cubic root of 122147217 is about 496.1669803404.

Adding to 122147217 its reverse (712741221), we get a palindrome (834888438).

The spelling of 122147217 in words is "one hundred twenty-two million, one hundred forty-seven thousand, two hundred seventeen".