122220211121 has 2 divisors, whose sum is σ = 122220211122. Its totient is φ = 122220211120.

The previous prime is 122220211097. The next prime is 122220211151. The reversal of 122220211121 is 121112022221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87639089521 + 34581121600 = 296039^2 + 185960^2 .

It is a cyclic number.

It is not a de Polignac number, because 122220211121 - 2¹⁰ = 122220210097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122220211121.

It is not a weakly prime, because it can be changed into another prime (122220211151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61110105560 + 61110105561.

It is an arithmetic number, because the mean of its divisors is an integer number (61110105561).

Almost surely, 2^122220211121 is an apocalyptic number.

It is an amenable number.

122220211121 is a deficient number, since it is larger than the sum of its proper divisors (1).

122220211121 is an equidigital number, since it uses as much as digits as its factorization.

122220211121 is an evil number, because the sum of its binary digits is even.

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

Adding to 122220211121 its reverse (121112022221), we get a palindrome (243332233342).

The spelling of 122220211121 in words is "one hundred twenty-two billion, two hundred twenty million, two hundred eleven thousand, one hundred twenty-one".