33031220312 has 8 divisors (see below), whose sum is σ = 61933538100. Its totient is φ = 16515610152.

The previous prime is 33031220311. The next prime is 33031220333. The reversal of 33031220312 is 21302213033.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33031220311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2064451262 + ... + 2064451277.

Almost surely, 2^33031220312 is an apocalyptic number.

It is an amenable number.

33031220312 is a deficient number, since it is larger than the sum of its proper divisors (28902317788).

33031220312 is a wasteful number, since it uses less digits than its factorization.

33031220312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4128902545 (or 4128902541 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 33031220312 its reverse (21302213033), we get a palindrome (54333433345).

The spelling of 33031220312 in words is "thirty-three billion, thirty-one million, two hundred twenty thousand, three hundred twelve".