11201021001221 has 4 divisors (see below), whose sum is σ = 11206388047392. Its totient is φ = 11195653955052.

The previous prime is 11201021001211. The next prime is 11201021001227. The reversal of 11201021001221 is 12210012010211.

11201021001221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11201021001221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11201021001196 and 11201021001205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11201021001227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2683519955 + ... + 2683524128.

It is an arithmetic number, because the mean of its divisors is an integer number (2801597011848).

Almost surely, 2^{11201021001221} is an apocalyptic number.

It is an amenable number.

11201021001221 is a deficient number, since it is larger than the sum of its proper divisors (5367046171).

11201021001221 is an equidigital number, since it uses as much as digits as its factorization.

11201021001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5367046170.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11201021001221 its reverse (12210012010211), we get a palindrome (23411033011432).

The spelling of 11201021001221 in words is "eleven trillion, two hundred one billion, twenty-one million, one thousand, two hundred twenty-one".