33231121212 has 48 divisors (see below), whose sum is σ = 84748833792. Its totient is φ = 10089143040.

The previous prime is 33231121193. The next prime is 33231121213. The reversal of 33231121212 is 21212113233.

It is a super-2 number, since 2×33231121212² (a number of 22 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33231121213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2621058 + ... + 2633705.

It is an arithmetic number, because the mean of its divisors is an integer number (1765600704).

Almost surely, 2^33231121212 is an apocalyptic number.

It is an amenable number.

33231121212 is an abundant number, since it is smaller than the sum of its proper divisors (51517712580).

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

33231121212 is a wasteful number, since it uses less digits than its factorization.

33231121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5254818 (or 5254816 counting only the distinct ones).

The product of its digits is 432, while the sum is 21.

Adding to 33231121212 its reverse (21212113233), we get a palindrome (54443234445).

The spelling of 33231121212 in words is "thirty-three billion, two hundred thirty-one million, one hundred twenty-one thousand, two hundred twelve".