11213332221 has 64 divisors (see below), whose sum is σ = 18944851968. Its totient is φ = 5740823808.

The previous prime is 11213332171. The next prime is 11213332253. The reversal of 11213332221 is 12223331211.

It is not a de Polignac number, because 11213332221 - 2¹³ = 11213324029 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11213332021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5079700 + ... + 5081906.

It is an arithmetic number, because the mean of its divisors is an integer number (296013312).

Almost surely, 2^11213332221 is an apocalyptic number.

It is an amenable number.

11213332221 is a deficient number, since it is larger than the sum of its proper divisors (7731519747).

11213332221 is a wasteful number, since it uses less digits than its factorization.

11213332221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2770.

The product of its digits is 432, while the sum is 21.

Adding to 11213332221 its reverse (12223331211), we get a palindrome (23436663432).

The spelling of 11213332221 in words is "eleven billion, two hundred thirteen million, three hundred thirty-two thousand, two hundred twenty-one".