122222020121 has 4 divisors (see below), whose sum is σ = 125203045044. Its totient is φ = 119240995200.

The previous prime is 122222020049. The next prime is 122222020147. The reversal of 122222020121 is 121020222221.

It is a happy number.

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 46134314521 + 76087705600 = 214789^2 + 275840^2 .

It is a cyclic number.

It is not a de Polignac number, because 122222020121 - 2¹⁰ = 122222019097 is a prime.

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 122222020121.

It is not an unprimeable number, because it can be changed into a prime (122222020321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1490512400 + ... + 1490512481.

It is an arithmetic number, because the mean of its divisors is an integer number (31300761261).

Almost surely, 2^122222020121 is an apocalyptic number.

It is an amenable number.

122222020121 is a deficient number, since it is larger than the sum of its proper divisors (2981024923).

122222020121 is an equidigital number, since it uses as much as digits as its factorization.

122222020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2981024922.

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

Adding to 122222020121 its reverse (121020222221), we get a palindrome (243242242342).

The spelling of 122222020121 in words is "one hundred twenty-two billion, two hundred twenty-two million, twenty thousand, one hundred twenty-one".