21200222111 has 2 divisors, whose sum is σ = 21200222112. Its totient is φ = 21200222110.

The previous prime is 21200222093. The next prime is 21200222137. The reversal of 21200222111 is 11122200212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21200222111 - 2⁶ = 21200222047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21200222161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600111055 + 10600111056.

It is an arithmetic number, because the mean of its divisors is an integer number (10600111056).

Almost surely, 2^21200222111 is an apocalyptic number.

21200222111 is a deficient number, since it is larger than the sum of its proper divisors (1).

21200222111 is an equidigital number, since it uses as much as digits as its factorization.

21200222111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21200222111 its reverse (11122200212), we get a palindrome (32322422323).

The spelling of 21200222111 in words is "twenty-one billion, two hundred million, two hundred twenty-two thousand, one hundred eleven".