122215321 has 4 divisors (see below), whose sum is σ = 122254132. Its totient is φ = 122176512.

The previous prime is 122215319. The next prime is 122215339. The reversal of 122215321 is 123512221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 66504025 + 55711296 = 8155^2 + 7464^2 .

It is a cyclic number.

It is not a de Polignac number, because 122215321 - 2¹ = 122215319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122215351) 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, 14220 + ... + 21133.

It is an arithmetic number, because the mean of its divisors is an integer number (30563533).

Almost surely, 2^122215321 is an apocalyptic number.

It is an amenable number.

122215321 is a deficient number, since it is larger than the sum of its proper divisors (38811).

122215321 is an equidigital number, since it uses as much as digits as its factorization.

122215321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38810.

The product of its digits is 240, while the sum is 19.

The square root of 122215321 is about 11055.1038439266. The cubic root of 122215321 is about 496.2591769500.

Adding to 122215321 its reverse (123512221), we get a palindrome (245727542).

The spelling of 122215321 in words is "one hundred twenty-two million, two hundred fifteen thousand, three hundred twenty-one".