122115121 has 2 divisors, whose sum is σ = 122115122. Its totient is φ = 122115120.

The previous prime is 122115113. The next prime is 122115157. The reversal of 122115121 is 121511221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110986225 + 11128896 = 10535^2 + 3336^2 .

It is a cyclic number.

It is not a de Polignac number, because 122115121 - 2³ = 122115113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122115095 and 122115104.

It is not a weakly prime, because it can be changed into another prime (122115181) 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 as a sum of consecutive naturals, namely, 61057560 + 61057561.

It is an arithmetic number, because the mean of its divisors is an integer number (61057561).

Almost surely, 2^122115121 is an apocalyptic number.

It is an amenable number.

122115121 is a deficient number, since it is larger than the sum of its proper divisors (1).

122115121 is an equidigital number, since it uses as much as digits as its factorization.

122115121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40, while the sum is 16.

The square root of 122115121 is about 11050.5710712162. The cubic root of 122115121 is about 496.1235181128.

Adding to 122115121 its reverse (121511221), we get a palindrome (243626342).

The spelling of 122115121 in words is "one hundred twenty-two million, one hundred fifteen thousand, one hundred twenty-one".