221332010212 has 6 divisors (see below), whose sum is σ = 387331017878. Its totient is φ = 110666005104.

The previous prime is 221332010201. The next prime is 221332010219. The reversal of 221332010212 is 212010233122.

It can be written as a sum of positive squares in only one way, i.e., 213606654976 + 7725355236 = 462176^2 + 87894^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 221332010212.

It is not an unprimeable number, because it can be changed into a prime (221332010219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27666501273 + ... + 27666501280.

Almost surely, 2^221332010212 is an apocalyptic number.

It is an amenable number.

221332010212 is a deficient number, since it is larger than the sum of its proper divisors (165999007666).

221332010212 is a wasteful number, since it uses less digits than its factorization.

221332010212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55333002557 (or 55333002555 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 221332010212 its reverse (212010233122), we get a palindrome (433342243334).

The spelling of 221332010212 in words is "two hundred twenty-one billion, three hundred thirty-two million, ten thousand, two hundred twelve".