11220132221 has 4 divisors (see below), whose sum is σ = 11288967552. Its totient is φ = 11151296892.

The previous prime is 11220132211. The next prime is 11220132227. The reversal of 11220132221 is 12223102211.

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 a de Polignac number, because none of the positive numbers 2^k-11220132221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11220132221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220132227) 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, 34417421 + ... + 34417746.

It is an arithmetic number, because the mean of its divisors is an integer number (2822241888).

Almost surely, 2^11220132221 is an apocalyptic number.

It is an amenable number.

11220132221 is a deficient number, since it is larger than the sum of its proper divisors (68835331).

11220132221 is an equidigital number, since it uses as much as digits as its factorization.

11220132221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68835330.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 11220132221 its reverse (12223102211), we get a palindrome (23443234432).

The spelling of 11220132221 in words is "eleven billion, two hundred twenty million, one hundred thirty-two thousand, two hundred twenty-one".