33120222012 has 36 divisors (see below), whose sum is σ = 84183122296. Its totient is φ = 10979076960.

The previous prime is 33120222011. The next prime is 33120222017. The reversal of 33120222012 is 21022202133.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×33120222012² (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 not an unprimeable number, because it can be changed into a prime (33120222011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2534938 + ... + 2547969.

Almost surely, 2^33120222012 is an apocalyptic number.

It is an amenable number.

33120222012 is an abundant number, since it is smaller than the sum of its proper divisors (51062900284).

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

33120222012 is a wasteful number, since it uses less digits than its factorization.

33120222012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5083098 (or 5083093 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 33120222012 its reverse (21022202133), we get a palindrome (54142424145).

The spelling of 33120222012 in words is "thirty-three billion, one hundred twenty million, two hundred twenty-two thousand, twelve".