122211211022111 has 2 divisors, whose sum is σ = 122211211022112. Its totient is φ = 122211211022110.

The previous prime is 122211211022107. The next prime is 122211211022141. The reversal of 122211211022111 is 111220112112221.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 122211211022111 - 2² = 122211211022107 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122211211022141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61105605511055 + 61105605511056.

It is an arithmetic number, because the mean of its divisors is an integer number (61105605511056).

Almost surely, 2^{122211211022111} is an apocalyptic number.

122211211022111 is a deficient number, since it is larger than the sum of its proper divisors (1).

122211211022111 is an equidigital number, since it uses as much as digits as its factorization.

122211211022111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 122211211022111 its reverse (111220112112221), we get a palindrome (233431323134332).

The spelling of 122211211022111 in words is "one hundred twenty-two trillion, two hundred eleven billion, two hundred eleven million, twenty-two thousand, one hundred eleven".