22031212111 has 2 divisors, whose sum is σ = 22031212112. Its totient is φ = 22031212110.

The previous prime is 22031212109. The next prime is 22031212123. The reversal of 22031212111 is 11121213022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22031212111 - 2¹ = 22031212109 is a prime.

Together with 22031212109, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22031212141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11015606055 + 11015606056.

It is an arithmetic number, because the mean of its divisors is an integer number (11015606056).

Almost surely, 2^22031212111 is an apocalyptic number.

22031212111 is a deficient number, since it is larger than the sum of its proper divisors (1).

22031212111 is an equidigital number, since it uses as much as digits as its factorization.

22031212111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 22031212111 its reverse (11121213022), we get a palindrome (33152425133).

The spelling of 22031212111 in words is "twenty-two billion, thirty-one million, two hundred twelve thousand, one hundred eleven".