33012312220 has 24 divisors (see below), whose sum is σ = 69331449600. Its totient is φ = 13203859392.

The previous prime is 33012312217. The next prime is 33012312239. The reversal of 33012312220 is 2221321033.

It is a super-2 number, since 2×33012312220² (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 (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216901 + ... + 336259.

It is an arithmetic number, because the mean of its divisors is an integer number (2888810400).

Almost surely, 2^33012312220 is an apocalyptic number.

It is an amenable number.

33012312220 is an abundant number, since it is smaller than the sum of its proper divisors (36319137380).

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

33012312220 is a wasteful number, since it uses less digits than its factorization.

33012312220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133197 (or 133195 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 33012312220 its reverse (2221321033), we get a palindrome (35233633253).

The spelling of 33012312220 in words is "thirty-three billion, twelve million, three hundred twelve thousand, two hundred twenty".