12212100212221 has 32 divisors (see below), whose sum is σ = 15935325170688. Its totient is φ = 9081998346240.

The previous prime is 12212100212209. The next prime is 12212100212233. The reversal of 12212100212221 is 12221200121221.

It is an interprime number because it is at equal distance from previous prime (12212100212209) and next prime (12212100212233).

It is a cyclic number.

It is not a de Polignac number, because 12212100212221 - 2²⁹ = 12211563341309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212100212821) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4009365 + ... + 6363898.

It is an arithmetic number, because the mean of its divisors is an integer number (497978911584).

Almost surely, 2^{12212100212221} is an apocalyptic number.

It is an amenable number.

12212100212221 is a deficient number, since it is larger than the sum of its proper divisors (3723224958467).

12212100212221 is a wasteful number, since it uses less digits than its factorization.

12212100212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10374061.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 12212100212221 its reverse (12221200121221), we get a palindrome (24433300333442).

The spelling of 12212100212221 in words is "twelve trillion, two hundred twelve billion, one hundred million, two hundred twelve thousand, two hundred twenty-one".