122221121 has 8 divisors (see below), whose sum is σ = 134132544. Its totient is φ = 110443120.

The previous prime is 122221087. The next prime is 122221147. The reversal of 122221121 is 121122221.

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 122221121 - 2¹⁴ = 122204737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 122221096 and 122221105.

It is not an unprimeable number, because it can be changed into a prime (122221181) 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, 31430 + ... + 35103.

It is an arithmetic number, because the mean of its divisors is an integer number (16766568).

Almost surely, 2^122221121 is an apocalyptic number.

122221121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122221121 is a deficient number, since it is larger than the sum of its proper divisors (11911423).

122221121 is a wasteful number, since it uses less digits than its factorization.

122221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66711.

The product of its digits is 32, while the sum is 14.

The square root of 122221121 is about 11055.3661630902. The cubic root of 122221121 is about 496.2670271870.

Adding to 122221121 its reverse (121122221), we get a palindrome (243343342).

It can be divided in two parts, 122221 and 121, that multiplied together give a palindrome (14788741).

The spelling of 122221121 in words is "one hundred twenty-two million, two hundred twenty-one thousand, one hundred twenty-one".