122120212221121 has 2 divisors, whose sum is σ = 122120212221122. Its totient is φ = 122120212221120.

The previous prime is 122120212221107. The next prime is 122120212221149. The reversal of 122120212221121 is 121122212021221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118601661612721 + 3518550608400 = 10890439^2 + 1875780^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122120212221121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122120212221092 and 122120212221101.

It is not a weakly prime, because it can be changed into another prime (122120212221151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61060106110560 + 61060106110561.

It is an arithmetic number, because the mean of its divisors is an integer number (61060106110561).

Almost surely, 2^{122120212221121} is an apocalyptic number.

It is an amenable number.

122120212221121 is a deficient number, since it is larger than the sum of its proper divisors (1).

122120212221121 is an equidigital number, since it uses as much as digits as its factorization.

122120212221121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 122120212221121 its reverse (121122212021221), we get a palindrome (243242424242342).

The spelling of 122120212221121 in words is "one hundred twenty-two trillion, one hundred twenty billion, two hundred twelve million, two hundred twenty-one thousand, one hundred twenty-one".