33131331012 has 24 divisors (see below), whose sum is σ = 83253088576. Its totient is φ = 10194255648.

The previous prime is 33131330987. The next prime is 33131331049. The reversal of 33131331012 is 21013313133.

It is a self number, because there is not a number n which added to its sum of digits gives 33131331012.

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, 106190008 + ... + 106190319.

Almost surely, 2^33131331012 is an apocalyptic number.

It is an amenable number.

33131331012 is an abundant number, since it is smaller than the sum of its proper divisors (50121757564).

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

33131331012 is a wasteful number, since it uses less digits than its factorization.

33131331012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212380347 (or 212380345 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 21.

Adding to 33131331012 its reverse (21013313133), we get a palindrome (54144644145).

The spelling of 33131331012 in words is "thirty-three billion, one hundred thirty-one million, three hundred thirty-one thousand, twelve".