122216161 has 8 divisors (see below), whose sum is σ = 123963048. Its totient is φ = 120480000.

The previous prime is 122216147. The next prime is 122216177. The reversal of 122216161 is 161612221.

It can be written as a sum of positive squares in 4 ways, for example, as 92448225 + 29767936 = 9615^2 + 5456^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 122216161 - 2¹⁵ = 122183393 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (122216131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21831 + ... + 26851.

It is an arithmetic number, because the mean of its divisors is an integer number (15495381).

Almost surely, 2^122216161 is an apocalyptic number.

It is an amenable number.

122216161 is a deficient number, since it is larger than the sum of its proper divisors (1746887).

122216161 is a wasteful number, since it uses less digits than its factorization.

122216161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5363.

The product of its digits is 288, while the sum is 22.

The square root of 122216161 is about 11055.1418353633. The cubic root of 122216161 is about 496.2603138963.

Adding to 122216161 its reverse (161612221), we get a palindrome (283828382).

The spelling of 122216161 in words is "one hundred twenty-two million, two hundred sixteen thousand, one hundred sixty-one".