221323001021212 has 12 divisors (see below), whose sum is σ = 390101692448440. Its totient is φ = 109865374607376.

The previous prime is 221323001021167. The next prime is 221323001021219. The reversal of 221323001021212 is 212120100323122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221323001021219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199031475183 + ... + 199031476294.

Almost surely, 2^{221323001021212} is an apocalyptic number.

It is an amenable number.

221323001021212 is a deficient number, since it is larger than the sum of its proper divisors (168778691427228).

221323001021212 is a wasteful number, since it uses less digits than its factorization.

221323001021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398062951620 (or 398062951618 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 221323001021212 its reverse (212120100323122), we get a palindrome (433443101344334).

The spelling of 221323001021212 in words is "two hundred twenty-one trillion, three hundred twenty-three billion, one million, twenty-one thousand, two hundred twelve".