21333000011111 has 16 divisors (see below), whose sum is σ = 23181760680960. Its totient is φ = 19556925949440.

The previous prime is 21333000011087. The next prime is 21333000011129. The reversal of 21333000011111 is 11111000033312.

It is a cyclic number.

It is not a de Polignac number, because 21333000011111 - 2⁴² = 16934953500007 is a prime.

It is a super-2 number, since 2×21333000011111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21333000011111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21333000011161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7397420 + ... + 9868526.

It is an arithmetic number, because the mean of its divisors is an integer number (1448860042560).

Almost surely, 2^{21333000011111} is an apocalyptic number.

21333000011111 is a deficient number, since it is larger than the sum of its proper divisors (1848760669849).

21333000011111 is a wasteful number, since it uses less digits than its factorization.

21333000011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2485814.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 21333000011111 its reverse (11111000033312), we get a palindrome (32444000044423).

The spelling of 21333000011111 in words is "twenty-one trillion, three hundred thirty-three billion, eleven thousand, one hundred eleven".