11101201221 has 16 divisors (see below), whose sum is σ = 16163877888. Its totient is φ = 6721052400.

The previous prime is 11101201213. The next prime is 11101201273. The reversal of 11101201221 is 12210210111.

It is not a de Polignac number, because 11101201221 - 2³ = 11101201213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11101201197 and 11101201206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11101201201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141181 + ... + 205266.

It is an arithmetic number, because the mean of its divisors is an integer number (1010242368).

Almost surely, 2^11101201221 is an apocalyptic number.

11101201221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11101201221 is a deficient number, since it is larger than the sum of its proper divisors (5062676667).

11101201221 is a wasteful number, since it uses less digits than its factorization.

11101201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347432.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11101201221 its reverse (12210210111), we get a palindrome (23311411332).

The spelling of 11101201221 in words is "eleven billion, one hundred one million, two hundred one thousand, two hundred twenty-one".