33420221312 has 16 divisors (see below), whose sum is σ = 66579347400. Its totient is φ = 16710110592.

The previous prime is 33420221297. The next prime is 33420221321. The reversal of 33420221312 is 21312202433.

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-2 number, since 2×33420221312² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130547612 + ... + 130547867.

Almost surely, 2^33420221312 is an apocalyptic number.

33420221312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

33420221312 is a deficient number, since it is larger than the sum of its proper divisors (33159126088).

33420221312 is an equidigital number, since it uses as much as digits as its factorization.

33420221312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261095493 (or 261095481 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 33420221312 its reverse (21312202433), we get a palindrome (54732423745).

The spelling of 33420221312 in words is "thirty-three billion, four hundred twenty million, two hundred twenty-one thousand, three hundred twelve".