33221213213 has 8 divisors (see below), whose sum is σ = 34033914936. Its totient is φ = 32408627200.

The previous prime is 33221213189. The next prime is 33221213227. The reversal of 33221213213 is 31231212233.

It can be written as a sum of positive squares in 4 ways, for example, as 368563204 + 32852650009 = 19198^2 + 181253^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 33221213213 - 2⁶ = 33221213149 is a prime.

It is a super-2 number, since 2×33221213213² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33221213413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 961823 + ... + 995763.

It is an arithmetic number, because the mean of its divisors is an integer number (4254239367).

Almost surely, 2^33221213213 is an apocalyptic number.

It is an amenable number.

33221213213 is a deficient number, since it is larger than the sum of its proper divisors (812701723).

33221213213 is a wasteful number, since it uses less digits than its factorization.

33221213213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57855.

The product of its digits is 1296, while the sum is 23.

Adding to 33221213213 its reverse (31231212233), we get a palindrome (64452425446).

The spelling of 33221213213 in words is "thirty-three billion, two hundred twenty-one million, two hundred thirteen thousand, two hundred thirteen".