33112311012 has 144 divisors (see below), whose sum is σ = 94620052800. Its totient is φ = 9671450880.

The previous prime is 33112310993. The next prime is 33112311019. The reversal of 33112311012 is 21011321133.

33112311012 is a `hidden beast` number, since 331 + 1 + 231 + 101 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (33112311019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7772539 + ... + 7776797.

It is an arithmetic number, because the mean of its divisors is an integer number (657083700).

Almost surely, 2^33112311012 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 33112311012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47310026400).

33112311012 is an abundant number, since it is smaller than the sum of its proper divisors (61507741788).

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

33112311012 is a wasteful number, since it uses less digits than its factorization.

33112311012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4986 (or 4981 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 33112311012 its reverse (21011321133), we get a palindrome (54123632145).

The spelling of 33112311012 in words is "thirty-three billion, one hundred twelve million, three hundred eleven thousand, twelve".