122220220121 has 16 divisors (see below), whose sum is σ = 135757607040. Its totient is φ = 109499900160.

The previous prime is 122220220091. The next prime is 122220220147. The reversal of 122220220121 is 121022022221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 122220220121 - 2¹⁴ = 122220203737 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 122220220121.

It is not an unprimeable number, because it can be changed into a prime (122220220621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1710851 + ... + 1780856.

It is an arithmetic number, because the mean of its divisors is an integer number (8484850440).

Almost surely, 2^122220220121 is an apocalyptic number.

It is an amenable number.

122220220121 is a deficient number, since it is larger than the sum of its proper divisors (13537386919).

122220220121 is a wasteful number, since it uses less digits than its factorization.

122220220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3491824.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 122220220121 its reverse (121022022221), we get a palindrome (243242242342).

The spelling of 122220220121 in words is "one hundred twenty-two billion, two hundred twenty million, two hundred twenty thousand, one hundred twenty-one".