11013221221 has 8 divisors (see below), whose sum is σ = 11479960800. Its totient is φ = 10552279920.

The previous prime is 11013221213. The next prime is 11013221227. The reversal of 11013221221 is 12212231011.

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 11013221221 - 2³ = 11013221213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11013221195 and 11013221204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11013221227) 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, 1445691 + ... + 1453288.

It is an arithmetic number, because the mean of its divisors is an integer number (1434995100).

Almost surely, 2^11013221221 is an apocalyptic number.

It is an amenable number.

11013221221 is a deficient number, since it is larger than the sum of its proper divisors (466739579).

11013221221 is a wasteful number, since it uses less digits than its factorization.

11013221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2899139.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 11013221221 its reverse (12212231011), we get a palindrome (23225452232).

The spelling of 11013221221 in words is "eleven billion, thirteen million, two hundred twenty-one thousand, two hundred twenty-one".