33131321212 has 96 divisors (see below), whose sum is σ = 67779452160. Its totient is φ = 14129121600.

The previous prime is 33131321189. The next prime is 33131321281. The reversal of 33131321212 is 21212313133.

It is a super-2 number, since 2×33131321212² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10822162 + ... + 10825222.

It is an arithmetic number, because the mean of its divisors is an integer number (706035960).

Almost surely, 2^33131321212 is an apocalyptic number.

It is an amenable number.

33131321212 is an abundant number, since it is smaller than the sum of its proper divisors (34648130948).

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

33131321212 is a wasteful number, since it uses less digits than its factorization.

33131321212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3224 (or 3200 counting only the distinct ones).

The product of its digits is 648, while the sum is 22.

Adding to 33131321212 its reverse (21212313133), we get a palindrome (54343634345).

The spelling of 33131321212 in words is "thirty-three billion, one hundred thirty-one million, three hundred twenty-one thousand, two hundred twelve".