33231100212 has 144 divisors (see below), whose sum is σ = 89898576768. Its totient is φ = 10325145600.

The previous prime is 33231100193. The next prime is 33231100283. The reversal of 33231100212 is 21200113233.

33231100212 is a `hidden beast` number, since 332 + 311 + 0 + 0 + 21 + 2 = 666.

It is a super-2 number, since 2×33231100212² (a number of 22 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21397228 + ... + 21398780.

It is an arithmetic number, because the mean of its divisors is an integer number (624295672).

Almost surely, 2^33231100212 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 33231100212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44949288384).

33231100212 is an abundant number, since it is smaller than the sum of its proper divisors (56667476556).

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

33231100212 is a wasteful number, since it uses less digits than its factorization.

33231100212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2230 (or 2225 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 33231100212 its reverse (21200113233), we get a palindrome (54431213445).

The spelling of 33231100212 in words is "thirty-three billion, two hundred thirty-one million, one hundred thousand, two hundred twelve".