11220221121 has 8 divisors (see below), whose sum is σ = 15140539680. Its totient is φ = 7390024992.

The previous prime is 11220221113. The next prime is 11220221143. The reversal of 11220221121 is 12112202211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11220221121 - 2³ = 11220221113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11220221121.

It is not an unprimeable number, because it can be changed into a prime (11220221161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22530316 + ... + 22530813.

It is an arithmetic number, because the mean of its divisors is an integer number (1892567460).

Almost surely, 2^11220221121 is an apocalyptic number.

It is an amenable number.

11220221121 is a deficient number, since it is larger than the sum of its proper divisors (3920318559).

11220221121 is an equidigital number, since it uses as much as digits as its factorization.

11220221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45061215.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 11220221121 its reverse (12112202211), we get a palindrome (23332423332).

The spelling of 11220221121 in words is "eleven billion, two hundred twenty million, two hundred twenty-one thousand, one hundred twenty-one".