33221320331 has 4 divisors (see below), whose sum is σ = 33223112664. Its totient is φ = 33219528000.

The previous prime is 33221320289. The next prime is 33221320333. The reversal of 33221320331 is 13302312233.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 33221320331 - 2¹⁸ = 33221058187 is a prime.

It is a super-3 number, since 3×33221320331³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33221320297 and 33221320306.

It is not an unprimeable number, because it can be changed into a prime (33221320333) 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 3 ways as a sum of consecutive naturals, for example, 868070 + ... + 905531.

It is an arithmetic number, because the mean of its divisors is an integer number (8305778166).

Almost surely, 2^33221320331 is an apocalyptic number.

33221320331 is a deficient number, since it is larger than the sum of its proper divisors (1792333).

33221320331 is a wasteful number, since it uses less digits than its factorization.

33221320331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1792332.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 33221320331 its reverse (13302312233), we get a palindrome (46523632564).

The spelling of 33221320331 in words is "thirty-three billion, two hundred twenty-one million, three hundred twenty thousand, three hundred thirty-one".