12201211010121 has 96 divisors (see below), whose sum is σ = 20685735279360. Its totient is φ = 6351554248704.

The previous prime is 12201211010111. The next prime is 12201211010159. The reversal of 12201211010121 is 12101011210221.

It is a happy number.

It is not a de Polignac number, because 12201211010121 - 2¹⁴ = 12201210993737 is a prime.

It is a super-2 number, since 2×12201211010121² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12201211010121.

It is not an unprimeable number, because it can be changed into a prime (12201211010111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 17503500 + ... + 18187218.

It is an arithmetic number, because the mean of its divisors is an integer number (215476409160).

Almost surely, 2^{12201211010121} is an apocalyptic number.

It is an amenable number.

12201211010121 is a deficient number, since it is larger than the sum of its proper divisors (8484524269239).

12201211010121 is a wasteful number, since it uses less digits than its factorization.

12201211010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683983 (or 683976 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 12201211010121 its reverse (12101011210221), we get a palindrome (24302222220342).

The spelling of 12201211010121 in words is "twelve trillion, two hundred one billion, two hundred eleven million, ten thousand, one hundred twenty-one".