222222201212111 has 2 divisors, whose sum is σ = 222222201212112. Its totient is φ = 222222201212110.

The previous prime is 222222201212093. The next prime is 222222201212113. The reversal of 222222201212111 is 111212102222222.

222222201212111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 222222201212111 - 2¹⁸ = 222222200949967 is a prime.

It is a super-2 number, since 2×222222201212111² (a number of 29 digits) contains 22 as substring.

Together with 222222201212113, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222222201212113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111111100606055 + 111111100606056.

It is an arithmetic number, because the mean of its divisors is an integer number (111111100606056).

Almost surely, 2^{222222201212111} is an apocalyptic number.

222222201212111 is a deficient number, since it is larger than the sum of its proper divisors (1).

222222201212111 is an equidigital number, since it uses as much as digits as its factorization.

222222201212111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 222222201212111 its reverse (111212102222222), we get a palindrome (333434303434333).

The spelling of 222222201212111 in words is "two hundred twenty-two trillion, two hundred twenty-two billion, two hundred one million, two hundred twelve thousand, one hundred eleven".