11101132221 has 4 divisors (see below), whose sum is σ = 14801509632. Its totient is φ = 7400754812.

The previous prime is 11101132199. The next prime is 11101132267. The reversal of 11101132221 is 12223110111.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12223110111 = 3 ⋅4074370037.

It is a cyclic number.

It is not a de Polignac number, because 11101132221 - 2⁹ = 11101131709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11101132221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11101134221) 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, 1850188701 + ... + 1850188706.

It is an arithmetic number, because the mean of its divisors is an integer number (3700377408).

Almost surely, 2^11101132221 is an apocalyptic number.

It is an amenable number.

11101132221 is a deficient number, since it is larger than the sum of its proper divisors (3700377411).

11101132221 is an equidigital number, since it uses as much as digits as its factorization.

11101132221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3700377410.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 11101132221 its reverse (12223110111), we get a palindrome (23324242332).

The spelling of 11101132221 in words is "eleven billion, one hundred one million, one hundred thirty-two thousand, two hundred twenty-one".