12201020121221 has 8 divisors (see below), whose sum is σ = 12259260830784. Its totient is φ = 12142783336320.

The previous prime is 12201020121211. The next prime is 12201020121229. The reversal of 12201020121221 is 12212102010221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12201020121221 - 2³⁴ = 12183840252037 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 12201020121221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12201020121229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5348501 + ... + 7280693.

It is an arithmetic number, because the mean of its divisors is an integer number (1532407603848).

Almost surely, 2^{12201020121221} is an apocalyptic number.

It is an amenable number.

12201020121221 is a deficient number, since it is larger than the sum of its proper divisors (58240709563).

12201020121221 is a wasteful number, since it uses less digits than its factorization.

12201020121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1962331.

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

Adding to 12201020121221 its reverse (12212102010221), we get a palindrome (24413122131442).

The spelling of 12201020121221 in words is "twelve trillion, two hundred one billion, twenty million, one hundred twenty-one thousand, two hundred twenty-one".