33213013321 has 4 divisors (see below), whose sum is σ = 33613170192. Its totient is φ = 32812856452.

The previous prime is 33213013297. The next prime is 33213013331. The reversal of 33213013321 is 12331031233.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12331031233 = 61 ⋅202148053.

It is a cyclic number.

It is not a de Polignac number, because 33213013321 - 2¹⁹ = 33212489033 is a prime.

It is a super-2 number, since 2×33213013321² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33213013292 and 33213013301.

It is not an unprimeable number, because it can be changed into a prime (33213013331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200078311 + ... + 200078476.

It is an arithmetic number, because the mean of its divisors is an integer number (8403292548).

Almost surely, 2^33213013321 is an apocalyptic number.

It is an amenable number.

33213013321 is a deficient number, since it is larger than the sum of its proper divisors (400156871).

33213013321 is an equidigital number, since it uses as much as digits as its factorization.

33213013321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400156870.

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

Adding to 33213013321 its reverse (12331031233), we get a palindrome (45544044554).

The spelling of 33213013321 in words is "thirty-three billion, two hundred thirteen million, thirteen thousand, three hundred twenty-one".