11221220032221 has 16 divisors (see below), whose sum is σ = 15009367867200. Its totient is φ = 7456956695040.

The previous prime is 11221220032207. The next prime is 11221220032381. The reversal of 11221220032221 is 12223002212211.

It is a de Polignac number, because none of the positive numbers 2^k-11221220032221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221220037221) 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, 1489741 + ... + 4966061.

It is an arithmetic number, because the mean of its divisors is an integer number (938085491700).

Almost surely, 2^{11221220032221} is an apocalyptic number.

It is an amenable number.

11221220032221 is a deficient number, since it is larger than the sum of its proper divisors (3788147834979).

11221220032221 is a wasteful number, since it uses less digits than its factorization.

11221220032221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3479756.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 11221220032221 its reverse (12223002212211), we get a palindrome (23444222244432).

The spelling of 11221220032221 in words is "eleven trillion, two hundred twenty-one billion, two hundred twenty million, thirty-two thousand, two hundred twenty-one".