21333112011 has 24 divisors (see below), whose sum is σ = 32532648720. Its totient is φ = 13433527296.

The previous prime is 21333111983. The next prime is 21333112039. The reversal of 21333112011 is 11021133312.

21333112011 is a `hidden beast` number, since 213 + 331 + 120 + 1 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (21333111983) and next prime (21333112039).

It is not a de Polignac number, because 21333112011 - 2¹⁴ = 21333095627 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21333132011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 127470 + ... + 242723.

It is an arithmetic number, because the mean of its divisors is an integer number (1355527030).

Almost surely, 2^21333112011 is an apocalyptic number.

21333112011 is a deficient number, since it is larger than the sum of its proper divisors (11199536709).

21333112011 is a wasteful number, since it uses less digits than its factorization.

21333112011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370555 (or 370552 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 21333112011 its reverse (11021133312), we get a palindrome (32354245323).

The spelling of 21333112011 in words is "twenty-one billion, three hundred thirty-three million, one hundred twelve thousand, eleven".