33221013312 has 56 divisors (see below), whose sum is σ = 88214724256. Its totient is φ = 11033676288.

The previous prime is 33221013257. The next prime is 33221013341. The reversal of 33221013312 is 21331012233.

It is a super-2 number, since 2×33221013312² (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 7 ways as a sum of consecutive naturals, for example, 259138 + ... + 365505.

Almost surely, 2^33221013312 is an apocalyptic number.

33221013312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

33221013312 is an abundant number, since it is smaller than the sum of its proper divisors (54993710944).

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

33221013312 is a wasteful number, since it uses less digits than its factorization.

33221013312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624935 (or 624925 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 33221013312 its reverse (21331012233), we get a palindrome (54552025545).

The spelling of 33221013312 in words is "thirty-three billion, two hundred twenty-one million, thirteen thousand, three hundred twelve".