65533221212 has 12 divisors (see below), whose sum is σ = 114700910520. Its totient is φ = 32761532496.

The previous prime is 65533221211. The next prime is 65533221227. The reversal of 65533221212 is 21212233556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65533221211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1240418 + ... + 1292169.

It is an arithmetic number, because the mean of its divisors is an integer number (9558409210).

Almost surely, 2^65533221212 is an apocalyptic number.

It is an amenable number.

65533221212 is a deficient number, since it is larger than the sum of its proper divisors (49167689308).

65533221212 is a wasteful number, since it uses less digits than its factorization.

65533221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2539060 (or 2539058 counting only the distinct ones).

The product of its digits is 21600, while the sum is 32.

Adding to 65533221212 its reverse (21212233556), we get a palindrome (86745454768).

The spelling of 65533221212 in words is "sixty-five billion, five hundred thirty-three million, two hundred twenty-one thousand, two hundred twelve".