33021222012 has 36 divisors (see below), whose sum is σ = 86348600520. Its totient is φ = 10627519392.

The previous prime is 33021222001. The next prime is 33021222029. The reversal of 33021222012 is 21022212033.

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

It is a super-2 number, since 2×33021222012² (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 11 ways as a sum of consecutive naturals, for example, 15813718 + ... + 15815805.

Almost surely, 2^33021222012 is an apocalyptic number.

It is an amenable number.

33021222012 is an abundant number, since it is smaller than the sum of its proper divisors (53327378508).

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

33021222012 is a wasteful number, since it uses less digits than its factorization.

33021222012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31629562 (or 31629557 counting only the distinct ones).

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

Adding to 33021222012 its reverse (21022212033), we get a palindrome (54043434045).

The spelling of 33021222012 in words is "thirty-three billion, twenty-one million, two hundred twenty-two thousand, twelve".