12221202121211 has 4 divisors (see below), whose sum is σ = 12393331728624. Its totient is φ = 12049072513800.

The previous prime is 12221202121181. The next prime is 12221202121253. The reversal of 12221202121211 is 11212120212221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12221202121211 is a prime.

It is a super-2 number, since 2×12221202121211² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12221202124211) 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, 86064803600 + ... + 86064803741.

It is an arithmetic number, because the mean of its divisors is an integer number (3098332932156).

Almost surely, 2^{12221202121211} is an apocalyptic number.

12221202121211 is a deficient number, since it is larger than the sum of its proper divisors (172129607413).

12221202121211 is an equidigital number, since it uses as much as digits as its factorization.

12221202121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172129607412.

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

Adding to 12221202121211 its reverse (11212120212221), we get a palindrome (23433322333432).

The spelling of 12221202121211 in words is "twelve trillion, two hundred twenty-one billion, two hundred two million, one hundred twenty-one thousand, two hundred eleven".