211222101122111 has 2 divisors, whose sum is σ = 211222101122112. Its totient is φ = 211222101122110.

The previous prime is 211222101122089. The next prime is 211222101122113. The reversal of 211222101122111 is 111221101222112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211222101122111 is a prime.

It is a super-2 number, since 2×211222101122111² (a number of 29 digits) contains 22 as substring.

Together with 211222101122113, 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 (211222101122113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105611050561055 + 105611050561056.

It is an arithmetic number, because the mean of its divisors is an integer number (105611050561056).

Almost surely, 2^{211222101122111} is an apocalyptic number.

211222101122111 is a deficient number, since it is larger than the sum of its proper divisors (1).

211222101122111 is an equidigital number, since it uses as much as digits as its factorization.

211222101122111 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 20.

Adding to 211222101122111 its reverse (111221101222112), we get a palindrome (322443202344223).

The spelling of 211222101122111 in words is "two hundred eleven trillion, two hundred twenty-two billion, one hundred one million, one hundred twenty-two thousand, one hundred eleven".