11224131221 has 32 divisors (see below), whose sum is σ = 12204960768. Its totient is φ = 10284318720.

The previous prime is 11224131151. The next prime is 11224131227. The reversal of 11224131221 is 12213142211.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11224131221 is a prime.

It is a super-2 number, since 2×11224131221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11224131193 and 11224131202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11224131227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48172121 + ... + 48172353.

It is an arithmetic number, because the mean of its divisors is an integer number (381405024).

Almost surely, 2^11224131221 is an apocalyptic number.

It is an amenable number.

11224131221 is a deficient number, since it is larger than the sum of its proper divisors (980829547).

11224131221 is a wasteful number, since it uses less digits than its factorization.

11224131221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701.

The product of its digits is 192, while the sum is 20.

Adding to 11224131221 its reverse (12213142211), we get a palindrome (23437273432).

The spelling of 11224131221 in words is "eleven billion, two hundred twenty-four million, one hundred thirty-one thousand, two hundred twenty-one".