12221011222111 has 2 divisors, whose sum is σ = 12221011222112. Its totient is φ = 12221011222110.

The previous prime is 12221011222097. The next prime is 12221011222129. The reversal of 12221011222111 is 11122211012221.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12221011222111 - 2³⁹ = 11671255408223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12221011222171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110505611055 + 6110505611056.

It is an arithmetic number, because the mean of its divisors is an integer number (6110505611056).

Almost surely, 2^{12221011222111} is an apocalyptic number.

12221011222111 is a deficient number, since it is larger than the sum of its proper divisors (1).

12221011222111 is an equidigital number, since it uses as much as digits as its factorization.

12221011222111 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 19.

Adding to 12221011222111 its reverse (11122211012221), we get a palindrome (23343222234332).

The spelling of 12221011222111 in words is "twelve trillion, two hundred twenty-one billion, eleven million, two hundred twenty-two thousand, one hundred eleven".