12221220200021 has 8 divisors (see below), whose sum is σ = 14029741576704. Its totient is φ = 10428357017520.

The previous prime is 12221220199973. The next prime is 12221220200027. The reversal of 12221220200021 is 12000202212221.

It is a happy number.

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-12221220200021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221220200027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3914546870 + ... + 3914549991.

It is an arithmetic number, because the mean of its divisors is an integer number (1753717697088).

Almost surely, 2^{12221220200021} is an apocalyptic number.

It is an amenable number.

12221220200021 is a deficient number, since it is larger than the sum of its proper divisors (1808521376683).

12221220200021 is an equidigital number, since it uses as much as digits as its factorization.

12221220200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7829097091.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 12221220200021 its reverse (12000202212221), we get a palindrome (24221422412242).

The spelling of 12221220200021 in words is "twelve trillion, two hundred twenty-one billion, two hundred twenty million, two hundred thousand, twenty-one".