21022303111 has 2 divisors, whose sum is σ = 21022303112. Its totient is φ = 21022303110.

The previous prime is 21022303109. The next prime is 21022303121. The reversal of 21022303111 is 11130322012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21022303111 - 2¹ = 21022303109 is a prime.

Together with 21022303109, 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 (21022303121) 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, 10511151555 + 10511151556.

It is an arithmetic number, because the mean of its divisors is an integer number (10511151556).

Almost surely, 2^21022303111 is an apocalyptic number.

21022303111 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022303111 is an equidigital number, since it uses as much as digits as its factorization.

21022303111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21022303111 its reverse (11130322012), we get a palindrome (32152625123).

The spelling of 21022303111 in words is "twenty-one billion, twenty-two million, three hundred three thousand, one hundred eleven".