12201212102221 has 4 divisors (see below), whose sum is σ = 12225468985632. Its totient is φ = 12176955218812.

The previous prime is 12201212102207. The next prime is 12201212102231. The reversal of 12201212102221 is 12220121210221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12201212102221 - 2²⁷ = 12201077884493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12201212102231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12128440951 + ... + 12128441956.

It is an arithmetic number, because the mean of its divisors is an integer number (3056367246408).

Almost surely, 2^{12201212102221} is an apocalyptic number.

It is an amenable number.

12201212102221 is a deficient number, since it is larger than the sum of its proper divisors (24256883411).

12201212102221 is an equidigital number, since it uses as much as digits as its factorization.

12201212102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24256883410.

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

Adding to 12201212102221 its reverse (12220121210221), we get a palindrome (24421333312442).

The spelling of 12201212102221 in words is "twelve trillion, two hundred one billion, two hundred twelve million, one hundred two thousand, two hundred twenty-one".