21112321333 has 16 divisors (see below), whose sum is σ = 22374400000. Its totient is φ = 19865693232.

The previous prime is 21112321273. The next prime is 21112321361. The reversal of 21112321333 is 33312321112.

It is a cyclic number.

It is not a de Polignac number, because 21112321333 - 2³³ = 12522386741 is a prime.

It is a super-2 number, since 2×21112321333² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112321393) 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, 2290468 + ... + 2299666.

It is an arithmetic number, because the mean of its divisors is an integer number (1398400000).

Almost surely, 2^21112321333 is an apocalyptic number.

It is an amenable number.

21112321333 is a deficient number, since it is larger than the sum of its proper divisors (1262078667).

21112321333 is a wasteful number, since it uses less digits than its factorization.

21112321333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10024.

The product of its digits is 648, while the sum is 22.

Adding to 21112321333 its reverse (33312321112), we get a palindrome (54424642445).

The spelling of 21112321333 in words is "twenty-one billion, one hundred twelve million, three hundred twenty-one thousand, three hundred thirty-three".