21223100111 has 12 divisors (see below), whose sum is σ = 22650602400. Its totient is φ = 19880153568.

The previous prime is 21223100089. The next prime is 21223100141. The reversal of 21223100111 is 11100132212.

It is not a de Polignac number, because 21223100111 - 2¹⁴ = 21223083727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21223100141) 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 in 11 ways as a sum of consecutive naturals, for example, 298151 + ... + 362408.

It is an arithmetic number, because the mean of its divisors is an integer number (1887550200).

Almost surely, 2^21223100111 is an apocalyptic number.

21223100111 is a deficient number, since it is larger than the sum of its proper divisors (1427502289).

21223100111 is an equidigital number, since it uses as much as digits as its factorization.

21223100111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660686 (or 660667 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21223100111 its reverse (11100132212), we get a palindrome (32323232323).

The spelling of 21223100111 in words is "twenty-one billion, two hundred twenty-three million, one hundred thousand, one hundred eleven".