11201221002121 has 4 divisors (see below), whose sum is σ = 11201439048192. Its totient is φ = 11201002956052.

The previous prime is 11201221002119. The next prime is 11201221002137. The reversal of 11201221002121 is 12120012210211.

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 not a de Polignac number, because 11201221002121 - 2¹ = 11201221002119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11201221002095 and 11201221002104.

It is not an unprimeable number, because it can be changed into a prime (11201221008121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108945961 + ... + 109048726.

It is an arithmetic number, because the mean of its divisors is an integer number (2800359762048).

Almost surely, 2^{11201221002121} is an apocalyptic number.

It is an amenable number.

11201221002121 is a deficient number, since it is larger than the sum of its proper divisors (218046071).

11201221002121 is an equidigital number, since it uses as much as digits as its factorization.

11201221002121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218046070.

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

Adding to 11201221002121 its reverse (12120012210211), we get a palindrome (23321233212332).

The spelling of 11201221002121 in words is "eleven trillion, two hundred one billion, two hundred twenty-one million, two thousand, one hundred twenty-one".