122816221 has 8 divisors (see below), whose sum is σ = 134164800. Its totient is φ = 111498240.

The previous prime is 122816219. The next prime is 122816231. The reversal of 122816221 is 122618221.

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 122816221 - 2¹ = 122816219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122816201) 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, 1200 + ... + 15718.

It is an arithmetic number, because the mean of its divisors is an integer number (16770600).

Almost surely, 2^122816221 is an apocalyptic number.

122816221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122816221 is a deficient number, since it is larger than the sum of its proper divisors (11348579).

122816221 is a wasteful number, since it uses less digits than its factorization.

122816221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15299.

The product of its digits is 768, while the sum is 25.

The square root of 122816221 is about 11082.2480120236. The cubic root of 122816221 is about 497.0711720990.

The spelling of 122816221 in words is "one hundred twenty-two million, eight hundred sixteen thousand, two hundred twenty-one".