21333111113 has 16 divisors (see below), whose sum is σ = 23091196176. Its totient is φ = 19634749440.

The previous prime is 21333111089. The next prime is 21333111119. The reversal of 21333111113 is 31111133312.

It can be written as a sum of positive squares in 8 ways, for example, as 860366224 + 20472744889 = 29332^2 + 143083^2 .

It is a cyclic number.

It is not a de Polignac number, because 21333111113 - 2¹² = 21333107017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21333111119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119945 + ... + 238857.

It is an arithmetic number, because the mean of its divisors is an integer number (1443199761).

Almost surely, 2^21333111113 is an apocalyptic number.

It is an amenable number.

21333111113 is a deficient number, since it is larger than the sum of its proper divisors (1758085063).

21333111113 is a wasteful number, since it uses less digits than its factorization.

21333111113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119164.

The product of its digits is 162, while the sum is 20.

Adding to 21333111113 its reverse (31111133312), we get a palindrome (52444244425).

The spelling of 21333111113 in words is "twenty-one billion, three hundred thirty-three million, one hundred eleven thousand, one hundred thirteen".