33220333212 has 96 divisors (see below), whose sum is σ = 87399696384. Its totient is φ = 9729638400.

The previous prime is 33220333187. The next prime is 33220333241. The reversal of 33220333212 is 21233302233.

It is a super-2 number, since 2×33220333212² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3502108 + ... + 3511580.

It is an arithmetic number, because the mean of its divisors is an integer number (910413504).

Almost surely, 2^33220333212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33220333212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43699848192).

33220333212 is an abundant number, since it is smaller than the sum of its proper divisors (54179363172).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33220333212 is a wasteful number, since it uses less digits than its factorization.

33220333212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10379 (or 10377 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 24.

Adding to 33220333212 its reverse (21233302233), we get a palindrome (54453635445).

The spelling of 33220333212 in words is "thirty-three billion, two hundred twenty million, three hundred thirty-three thousand, two hundred twelve".