12220021111 has 2 divisors, whose sum is σ = 12220021112. Its totient is φ = 12220021110.

The previous prime is 12220021109. The next prime is 12220021127. The reversal of 12220021111 is 11112002221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12220021111 - 2¹ = 12220021109 is a prime.

Together with 12220021109, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 12220021091 and 12220021100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12220021181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110010555 + 6110010556.

It is an arithmetic number, because the mean of its divisors is an integer number (6110010556).

Almost surely, 2^12220021111 is an apocalyptic number.

12220021111 is a deficient number, since it is larger than the sum of its proper divisors (1).

12220021111 is an equidigital number, since it uses as much as digits as its factorization.

12220021111 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 13.

Adding to 12220021111 its reverse (11112002221), we get a palindrome (23332023332).

The spelling of 12220021111 in words is "twelve billion, two hundred twenty million, twenty-one thousand, one hundred eleven".