12211220111 has 2 divisors, whose sum is σ = 12211220112. Its totient is φ = 12211220110.

The previous prime is 12211220101. The next prime is 12211220113. The reversal of 12211220111 is 11102211221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12211220111 - 2²² = 12207025807 is a prime.

It is a super-2 number, since 2×12211220111² (a number of 21 digits) contains 22 as substring.

Together with 12211220113, 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 (12211220113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105610055 + 6105610056.

It is an arithmetic number, because the mean of its divisors is an integer number (6105610056).

Almost surely, 2^12211220111 is an apocalyptic number.

12211220111 is a deficient number, since it is larger than the sum of its proper divisors (1).

12211220111 is an equidigital number, since it uses as much as digits as its factorization.

12211220111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12211220111 its reverse (11102211221), we get a palindrome (23313431332).

The spelling of 12211220111 in words is "twelve billion, two hundred eleven million, two hundred twenty thousand, one hundred eleven".