12212211010221 has 12 divisors (see below), whose sum is σ = 18116613330972. Its totient is φ = 7921434168576.

The previous prime is 12212211010177. The next prime is 12212211010229. The reversal of 12212211010221 is 12201011221221.

12212211010221 is a `hidden beast` number, since 1 + 221 + 2 + 211 + 0 + 10 + 221 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 11428523972100 + 783687038121 = 3380610^2 + 885261^2 .

It is not a de Polignac number, because 12212211010221 - 2⁹ = 12212211009709 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12212211010194 and 12212211010203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212211010229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18336652836 + ... + 18336653501.

It is an arithmetic number, because the mean of its divisors is an integer number (1509717777581).

Almost surely, 2^{12212211010221} is an apocalyptic number.

It is an amenable number.

12212211010221 is a deficient number, since it is larger than the sum of its proper divisors (5904402320751).

12212211010221 is a wasteful number, since it uses less digits than its factorization.

12212211010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36673306380 (or 36673306377 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12212211010221 its reverse (12201011221221), we get a palindrome (24413222231442).

The spelling of 12212211010221 in words is "twelve trillion, two hundred twelve billion, two hundred eleven million, ten thousand, two hundred twenty-one".