11201002001221 has 4 divisors (see below), whose sum is σ = 11201015816992. Its totient is φ = 11200988185452.

The previous prime is 11201002001171. The next prime is 11201002001227. The reversal of 11201002001221 is 12210020010211.

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 11201002001221 - 2¹⁹ = 11201001476933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11201002001227) 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, 5610561 + ... + 7340326.

It is an arithmetic number, because the mean of its divisors is an integer number (2800253954248).

Almost surely, 2^{11201002001221} is an apocalyptic number.

It is an amenable number.

11201002001221 is a deficient number, since it is larger than the sum of its proper divisors (13815771).

11201002001221 is an equidigital number, since it uses as much as digits as its factorization.

11201002001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13815770.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 11201002001221 its reverse (12210020010211), we get a palindrome (23411022011432).

The spelling of 11201002001221 in words is "eleven trillion, two hundred one billion, two million, one thousand, two hundred twenty-one".