11124221221 has 8 divisors (see below), whose sum is σ = 11241004544. Its totient is φ = 11007480960.

The previous prime is 11124221203. The next prime is 11124221231. The reversal of 11124221221 is 12212242111.

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 11124221221 - 2¹⁹ = 11123696933 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 (11124221231) 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, 993826 + ... + 1004956.

It is an arithmetic number, because the mean of its divisors is an integer number (1405125568).

Almost surely, 2^11124221221 is an apocalyptic number.

It is an amenable number.

11124221221 is a deficient number, since it is larger than the sum of its proper divisors (116783323).

11124221221 is a wasteful number, since it uses less digits than its factorization.

11124221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21531.

The product of its digits is 128, while the sum is 19.

Adding to 11124221221 its reverse (12212242111), we get a palindrome (23336463332).

The spelling of 11124221221 in words is "eleven billion, one hundred twenty-four million, two hundred twenty-one thousand, two hundred twenty-one".