21230332111 has 2 divisors, whose sum is σ = 21230332112. Its totient is φ = 21230332110.

The previous prime is 21230332103. The next prime is 21230332117. The reversal of 21230332111 is 11123303212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21230332111 - 2³ = 21230332103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21230332117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10615166055 + 10615166056.

It is an arithmetic number, because the mean of its divisors is an integer number (10615166056).

Almost surely, 2^21230332111 is an apocalyptic number.

21230332111 is a deficient number, since it is larger than the sum of its proper divisors (1).

21230332111 is an equidigital number, since it uses as much as digits as its factorization.

21230332111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21230332111 its reverse (11123303212), we get a palindrome (32353635323).

The spelling of 21230332111 in words is "twenty-one billion, two hundred thirty million, three hundred thirty-two thousand, one hundred eleven".