122166221 has 8 divisors (see below), whose sum is σ = 124991424. Its totient is φ = 119371840.

The previous prime is 122166217. The next prime is 122166223. The reversal of 122166221 is 122661221.

It is a happy number.

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 122166221 - 2² = 122166217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122166223) 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, 410 + ... + 15636.

It is an arithmetic number, because the mean of its divisors is an integer number (15623928).

Almost surely, 2^122166221 is an apocalyptic number.

It is an amenable number.

122166221 is a deficient number, since it is larger than the sum of its proper divisors (2825203).

122166221 is a wasteful number, since it uses less digits than its factorization.

122166221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15411.

The product of its digits is 576, while the sum is 23.

The square root of 122166221 is about 11052.8829270919. The cubic root of 122166221 is about 496.1927106806.

The spelling of 122166221 in words is "one hundred twenty-two million, one hundred sixty-six thousand, two hundred twenty-one".