13233320021 has 16 divisors (see below), whose sum is σ = 13832340480. Its totient is φ = 12645452160.

The previous prime is 13233319993. The next prime is 13233320027. The reversal of 13233320021 is 12002333231.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13233320021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13233319975 and 13233320002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13233320027) 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, 2350616 + ... + 2356238.

It is an arithmetic number, because the mean of its divisors is an integer number (864521280).

Almost surely, 2^13233320021 is an apocalyptic number.

It is an amenable number.

13233320021 is a deficient number, since it is larger than the sum of its proper divisors (599020459).

13233320021 is an equidigital number, since it uses as much as digits as its factorization.

13233320021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6596.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 13233320021 its reverse (12002333231), we get a palindrome (25235653252).

The spelling of 13233320021 in words is "thirteen billion, two hundred thirty-three million, three hundred twenty thousand, twenty-one".