12201020121111 has 16 divisors (see below), whose sum is σ = 16326195077088. Its totient is φ = 8104930265600.

The previous prime is 12201020121071. The next prime is 12201020121119. The reversal of 12201020121111 is 11112102010221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12201020121111 - 2⁹ = 12201020120599 is a prime.

It is a super-2 number, since 2×12201020121111² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12201020121119) 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 15 ways as a sum of consecutive naturals, for example, 86303995 + ... + 86445251.

It is an arithmetic number, because the mean of its divisors is an integer number (1020387192318).

Almost surely, 2^{12201020121111} is an apocalyptic number.

12201020121111 is a deficient number, since it is larger than the sum of its proper divisors (4125174955977).

12201020121111 is a wasteful number, since it uses less digits than its factorization.

12201020121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244002.

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

Adding to 12201020121111 its reverse (11112102010221), we get a palindrome (23313122131332).

The spelling of 12201020121111 in words is "twelve trillion, two hundred one billion, twenty million, one hundred twenty-one thousand, one hundred eleven".