12222101111221 has 2 divisors, whose sum is σ = 12222101111222. Its totient is φ = 12222101111220.

The previous prime is 12222101111189. The next prime is 12222101111261. The reversal of 12222101111221 is 12211110122221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7938649988721 + 4283451122500 = 2817561^2 + 2069650^2 .

It is a cyclic number.

It is not a de Polignac number, because 12222101111221 - 2⁵ = 12222101111189 is a prime.

It is a super-2 number, since 2×12222101111221² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12222101111261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6111050555610 + 6111050555611.

It is an arithmetic number, because the mean of its divisors is an integer number (6111050555611).

Almost surely, 2^{12222101111221} is an apocalyptic number.

It is an amenable number.

12222101111221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12222101111221 is an equidigital number, since it uses as much as digits as its factorization.

12222101111221 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 19.

Adding to 12222101111221 its reverse (12211110122221), we get a palindrome (24433211233442).

The spelling of 12222101111221 in words is "twelve trillion, two hundred twenty-two billion, one hundred one million, one hundred eleven thousand, two hundred twenty-one".