221332435641212 has 48 divisors (see below), whose sum is σ = 442737257383680. Its totient is φ = 94841248384512.

The previous prime is 221332435641211. The next prime is 221332435641271. The reversal of 221332435641212 is 212146534233122.

221332435641212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 221332435641212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221332435641211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6637235123 + ... + 6637268469.

It is an arithmetic number, because the mean of its divisors is an integer number (9223692862160).

Almost surely, 2^{221332435641212} is an apocalyptic number.

It is an amenable number.

221332435641212 is an abundant number, since it is smaller than the sum of its proper divisors (221404821742468).

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

221332435641212 is a wasteful number, since it uses less digits than its factorization.

221332435641212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65010 (or 65008 counting only the distinct ones).

The product of its digits is 414720, while the sum is 41.

Adding to 221332435641212 its reverse (212146534233122), we get a palindrome (433478969874334).

The spelling of 221332435641212 in words is "two hundred twenty-one trillion, three hundred thirty-two billion, four hundred thirty-five million, six hundred forty-one thousand, two hundred twelve".