12212211210221 has 8 divisors (see below), whose sum is σ = 13404144821664. Its totient is φ = 11033899697520.

The previous prime is 12212211210167. The next prime is 12212211210343. The reversal of 12212211210221 is 12201211221221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12212211210221 is a prime.

It is a super-2 number, since 2×12212211210221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12212211210193 and 12212211210202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212211210421) 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 7 ways as a sum of consecutive naturals, for example, 3405522806 + ... + 3405526391.

It is an arithmetic number, because the mean of its divisors is an integer number (1675518102708).

Almost surely, 2^{12212211210221} is an apocalyptic number.

12212211210221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12212211210221 is a deficient number, since it is larger than the sum of its proper divisors (1191933611443).

12212211210221 is a wasteful number, since it uses less digits than its factorization.

12212211210221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6811049371.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 12212211210221 its reverse (12201211221221), we get a palindrome (24413422431442).

The spelling of 12212211210221 in words is "twelve trillion, two hundred twelve billion, two hundred eleven million, two hundred ten thousand, two hundred twenty-one".