11201020121221 has 8 divisors (see below), whose sum is σ = 12898884677184. Its totient is φ = 9527585271360.

The previous prime is 11201020121153. The next prime is 11201020121237. The reversal of 11201020121221 is 12212102010211.

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

It is not a de Polignac number, because 11201020121221 - 2²⁹ = 11200483250309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11201020121195 and 11201020121204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11201020122221) 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, 6107425540 + ... + 6107427373.

It is an arithmetic number, because the mean of its divisors is an integer number (1612360584648).

Almost surely, 2^{11201020121221} is an apocalyptic number.

It is an amenable number.

11201020121221 is a deficient number, since it is larger than the sum of its proper divisors (1697864555963).

11201020121221 is a wasteful number, since it uses less digits than its factorization.

11201020121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12214853051.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 11201020121221 its reverse (12212102010211), we get a palindrome (23413122131432).

The spelling of 11201020121221 in words is "eleven trillion, two hundred one billion, twenty million, one hundred twenty-one thousand, two hundred twenty-one".