122221111321 has 4 divisors (see below), whose sum is σ = 122322878644. Its totient is φ = 122119344000.

The previous prime is 122221111301. The next prime is 122221111333. The reversal of 122221111321 is 123111122221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123111122221 = 2447 ⋅50311043.

It can be written as a sum of positive squares in 2 ways, for example, as 18367025625 + 103854085696 = 135525^2 + 322264^2 .

It is a cyclic number.

It is not a de Polignac number, because 122221111321 - 2⁵ = 122221111289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122221111301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50881860 + ... + 50884261.

It is an arithmetic number, because the mean of its divisors is an integer number (30580719661).

Almost surely, 2^122221111321 is an apocalyptic number.

It is an amenable number.

122221111321 is a deficient number, since it is larger than the sum of its proper divisors (101767323).

122221111321 is a wasteful number, since it uses less digits than its factorization.

122221111321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101767322.

The product of its digits is 96, while the sum is 19.

Adding to 122221111321 its reverse (123111122221), we get a palindrome (245332233542).

The spelling of 122221111321 in words is "one hundred twenty-two billion, two hundred twenty-one million, one hundred eleven thousand, three hundred twenty-one".