21003322111 has 2 divisors, whose sum is σ = 21003322112. Its totient is φ = 21003322110.

The previous prime is 21003322099. The next prime is 21003322127. The reversal of 21003322111 is 11122330012.

It is an a-pointer prime, because the next prime (21003322127) can be obtained adding 21003322111 to its sum of digits (16).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21003322111 - 2²⁷ = 20869104383 is a prime.

It is a super-2 number, since 2×21003322111² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21003322411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501661055 + 10501661056.

It is an arithmetic number, because the mean of its divisors is an integer number (10501661056).

Almost surely, 2^21003322111 is an apocalyptic number.

21003322111 is a deficient number, since it is larger than the sum of its proper divisors (1).

21003322111 is an equidigital number, since it uses as much as digits as its factorization.

21003322111 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 21003322111 its reverse (11122330012), we get a palindrome (32125652123).

The spelling of 21003322111 in words is "twenty-one billion, three million, three hundred twenty-two thousand, one hundred eleven".