12211211200121 has 4 divisors (see below), whose sum is σ = 12211218810000. Its totient is φ = 12211203590244.

The previous prime is 12211211200051. The next prime is 12211211200151. The reversal of 12211211200121 is 12100211211221.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12211211200121 - 2¹⁰ = 12211211199097 is a prime.

It is a super-2 number, since 2×12211211200121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12211211200121.

It is not an unprimeable number, because it can be changed into a prime (12211211200151) 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, 355691 + ... + 4954688.

It is an arithmetic number, because the mean of its divisors is an integer number (3052804702500).

Almost surely, 2^{12211211200121} is an apocalyptic number.

It is an amenable number.

12211211200121 is a deficient number, since it is larger than the sum of its proper divisors (7609879).

12211211200121 is an equidigital number, since it uses as much as digits as its factorization.

12211211200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7609878.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 12211211200121 its reverse (12100211211221), we get a palindrome (24311422411342).

It can be divided in two parts, 1221121 and 1200121, that added together give a palindrome (2421242).

The spelling of 12211211200121 in words is "twelve trillion, two hundred eleven billion, two hundred eleven million, two hundred thousand, one hundred twenty-one".