33123220212 has 24 divisors (see below), whose sum is σ = 77750318016. Its totient is φ = 10974958528.

The previous prime is 33123220181. The next prime is 33123220219. The reversal of 33123220212 is 21202232133.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33123220219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8262273 + ... + 8266280.

It is an arithmetic number, because the mean of its divisors is an integer number (3239596584).

Almost surely, 2^33123220212 is an apocalyptic number.

It is an amenable number.

33123220212 is an abundant number, since it is smaller than the sum of its proper divisors (44627097804).

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

33123220212 is a wasteful number, since it uses less digits than its factorization.

33123220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16528727 (or 16528725 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 33123220212 its reverse (21202232133), we get a palindrome (54325452345).

The spelling of 33123220212 in words is "thirty-three billion, one hundred twenty-three million, two hundred twenty thousand, two hundred twelve".