122221021121 has 4 divisors (see below), whose sum is σ = 122280095700. Its totient is φ = 122161946544.

The previous prime is 122221021103. The next prime is 122221021157. The reversal of 122221021121 is 121120122221.

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 74563948096 + 47657073025 = 273064^2 + 218305^2 .

It is a cyclic number.

It is not a de Polignac number, because 122221021121 - 2⁶ = 122221021057 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 122221021121.

It is not an unprimeable number, because it can be changed into a prime (122221021171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29534186 + ... + 29538323.

It is an arithmetic number, because the mean of its divisors is an integer number (30570023925).

Almost surely, 2^122221021121 is an apocalyptic number.

It is an amenable number.

122221021121 is a deficient number, since it is larger than the sum of its proper divisors (59074579).

122221021121 is an equidigital number, since it uses as much as digits as its factorization.

122221021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59074578.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 122221021121 its reverse (121120122221), we get a palindrome (243341143342).

The spelling of 122221021121 in words is "one hundred twenty-two billion, two hundred twenty-one million, twenty-one thousand, one hundred twenty-one".