21033113233 has 16 divisors (see below), whose sum is σ = 23015574720. Its totient is φ = 19062475200.

The previous prime is 21033113207. The next prime is 21033113261. The reversal of 21033113233 is 33231133012.

It is a cyclic number.

It is not a de Polignac number, because 21033113233 - 2¹⁷ = 21032982161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21033113033) 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, 6598066 + ... + 6601252.

It is an arithmetic number, because the mean of its divisors is an integer number (1438473420).

Almost surely, 2^21033113233 is an apocalyptic number.

It is an amenable number.

21033113233 is a deficient number, since it is larger than the sum of its proper divisors (1982461487).

21033113233 is a wasteful number, since it uses less digits than its factorization.

21033113233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4848.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 21033113233 its reverse (33231133012), we get a palindrome (54264246245).

The spelling of 21033113233 in words is "twenty-one billion, thirty-three million, one hundred thirteen thousand, two hundred thirty-three".