12222220211111 has 2 divisors, whose sum is σ = 12222220211112. Its totient is φ = 12222220211110.

The previous prime is 12222220211101. The next prime is 12222220211137. The reversal of 12222220211111 is 11111202222221.

12222220211111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12222220211111 - 2²² = 12222216016807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12222220211101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6111110105555 + 6111110105556.

It is an arithmetic number, because the mean of its divisors is an integer number (6111110105556).

Almost surely, 2^{12222220211111} is an apocalyptic number.

12222220211111 is a deficient number, since it is larger than the sum of its proper divisors (1).

12222220211111 is an equidigital number, since it uses as much as digits as its factorization.

12222220211111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 12222220211111 its reverse (11111202222221), we get a palindrome (23333422433332).

The spelling of 12222220211111 in words is "twelve trillion, two hundred twenty-two billion, two hundred twenty million, two hundred eleven thousand, one hundred eleven".