12101122200221 has 4 divisors (see below), whose sum is σ = 12101623908444. Its totient is φ = 12100620492000.

The previous prime is 12101122200173. The next prime is 12101122200229. The reversal of 12101122200221 is 12200222110121.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7207023468100 + 4894098732121 = 2684590^2 + 2212261^2 .

It is a cyclic number.

It is not a de Polignac number, because 12101122200221 - 2¹⁰ = 12101122199197 is a prime.

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 12101122200221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101122200229) 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, 250817930 + ... + 250866171.

It is an arithmetic number, because the mean of its divisors is an integer number (3025405977111).

Almost surely, 2^{12101122200221} is an apocalyptic number.

It is an amenable number.

12101122200221 is a deficient number, since it is larger than the sum of its proper divisors (501708223).

12101122200221 is an equidigital number, since it uses as much as digits as its factorization.

12101122200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501708222.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12101122200221 its reverse (12200222110121), we get a palindrome (24301344310342).

The spelling of 12101122200221 in words is "twelve trillion, one hundred one billion, one hundred twenty-two million, two hundred thousand, two hundred twenty-one".