11213213221 has 8 divisors (see below), whose sum is σ = 12815743104. Its totient is φ = 9610843920.

The previous prime is 11213213203. The next prime is 11213213237. The reversal of 11213213221 is 12231231211.

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

It is a cyclic number.

It is not a de Polignac number, because 11213213221 - 2¹⁷ = 11213082149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11213213321) 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, 237816 + ... + 281038.

It is an arithmetic number, because the mean of its divisors is an integer number (1601967888).

Almost surely, 2^11213213221 is an apocalyptic number.

It is an amenable number.

11213213221 is a deficient number, since it is larger than the sum of its proper divisors (1602529883).

11213213221 is an equidigital number, since it uses as much as digits as its factorization.

11213213221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80291.

The product of its digits is 144, while the sum is 19.

Adding to 11213213221 its reverse (12231231211), we get a palindrome (23444444432).

The spelling of 11213213221 in words is "eleven billion, two hundred thirteen million, two hundred thirteen thousand, two hundred twenty-one".