11100011201221 has 4 divisors (see below), whose sum is σ = 11108569422412. Its totient is φ = 11091452980032.

The previous prime is 11100011201141. The next prime is 11100011201267. The reversal of 11100011201221 is 12210211000111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8380364952996 + 2719646248225 = 2894886^2 + 1649135^2 .

It is a cyclic number.

It is not a de Polignac number, because 11100011201221 - 2³¹ = 11097863717573 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 (11100011201921) 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, 4279108650 + ... + 4279111243.

It is an arithmetic number, because the mean of its divisors is an integer number (2777142355603).

Almost surely, 2^{11100011201221} is an apocalyptic number.

It is an amenable number.

11100011201221 is a deficient number, since it is larger than the sum of its proper divisors (8558221191).

11100011201221 is an equidigital number, since it uses as much as digits as its factorization.

11100011201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8558221190.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11100011201221 its reverse (12210211000111), we get a palindrome (23310222201332).

The spelling of 11100011201221 in words is "eleven trillion, one hundred billion, eleven million, two hundred one thousand, two hundred twenty-one".