21233013321 has 16 divisors (see below), whose sum is σ = 30510300800. Its totient is φ = 13057096320.

The previous prime is 21233013157. The next prime is 21233013337. The reversal of 21233013321 is 12331033212.

It is not a de Polignac number, because 21233013321 - 2⁹ = 21233012809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21233013341) 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, 140020 + ... + 249141.

It is an arithmetic number, because the mean of its divisors is an integer number (1906893800).

Almost surely, 2^21233013321 is an apocalyptic number.

It is an amenable number.

21233013321 is a deficient number, since it is larger than the sum of its proper divisors (9277287479).

21233013321 is a wasteful number, since it uses less digits than its factorization.

21233013321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390576.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21233013321 its reverse (12331033212), we get a palindrome (33564046533).

The spelling of 21233013321 in words is "twenty-one billion, two hundred thirty-three million, thirteen thousand, three hundred twenty-one".