21333123300111 has 16 divisors (see below), whose sum is σ = 33386200687104. Its totient is φ = 11860887085344.

The previous prime is 21333123300043. The next prime is 21333123300187. The reversal of 21333123300111 is 11100332133312.

It is not a de Polignac number, because 21333123300111 - 2¹⁵ = 21333123267343 is a prime.

It is a super-2 number, since 2×21333123300111² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21333123300191) 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 15 ways as a sum of consecutive naturals, for example, 13727877795 + ... + 13727879348.

It is an arithmetic number, because the mean of its divisors is an integer number (2086637542944).

Almost surely, 2^{21333123300111} is an apocalyptic number.

21333123300111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21333123300111 is a deficient number, since it is larger than the sum of its proper divisors (12053077386993).

21333123300111 is a wasteful number, since it uses less digits than its factorization.

21333123300111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27455757190.

The product of its (nonzero) digits is 972, while the sum is 24.

Adding to 21333123300111 its reverse (11100332133312), we get a palindrome (32433455433423).

The spelling of 21333123300111 in words is "twenty-one trillion, three hundred thirty-three billion, one hundred twenty-three million, three hundred thousand, one hundred eleven".