121111102222211 has 2 divisors, whose sum is σ = 121111102222212. Its totient is φ = 121111102222210.

The previous prime is 121111102222163. The next prime is 121111102222219. The reversal of 121111102222211 is 112222201111121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121111102222211 - 2³⁰ = 121110028480387 is a prime.

It is not a weakly prime, because it can be changed into another prime (121111102222219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60555551111105 + 60555551111106.

It is an arithmetic number, because the mean of its divisors is an integer number (60555551111106).

Almost surely, 2^{121111102222211} is an apocalyptic number.

121111102222211 is a deficient number, since it is larger than the sum of its proper divisors (1).

121111102222211 is an equidigital number, since it uses as much as digits as its factorization.

121111102222211 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 20.

Adding to 121111102222211 its reverse (112222201111121), we get a palindrome (233333303333332).

The spelling of 121111102222211 in words is "one hundred twenty-one trillion, one hundred eleven billion, one hundred two million, two hundred twenty-two thousand, two hundred eleven".