12201111120021 has 32 divisors (see below), whose sum is σ = 17195656665600. Its totient is φ = 7673909791680.

The previous prime is 12201111120001. The next prime is 12201111120047. The reversal of 12201111120021 is 12002111110221.

It is a happy number.

It is not a de Polignac number, because 12201111120021 - 2¹⁰ = 12201111118997 is a prime.

It is a super-2 number, since 2×12201111120021² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12201111120001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34584406 + ... + 34935416.

It is an arithmetic number, because the mean of its divisors is an integer number (537364270800).

Almost surely, 2^{12201111120021} is an apocalyptic number.

It is an amenable number.

12201111120021 is a deficient number, since it is larger than the sum of its proper divisors (4994545545579).

12201111120021 is a wasteful number, since it uses less digits than its factorization.

12201111120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353569.

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

Adding to 12201111120021 its reverse (12002111110221), we get a palindrome (24203222230242).

The spelling of 12201111120021 in words is "twelve trillion, two hundred one billion, one hundred eleven million, one hundred twenty thousand, twenty-one".