11221531224 has 64 divisors (see below), whose sum is σ = 29756872800. Its totient is φ = 3514220544.

The previous prime is 11221531183. The next prime is 11221531259. The reversal of 11221531224 is 42213512211.

It is a happy number.

It is a super-2 number, since 2×11221531224² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 11221531194 and 11221531203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207984 + ... + 256320.

Almost surely, 2^11221531224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11221531224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14878436400).

11221531224 is an abundant number, since it is smaller than the sum of its proper divisors (18535341576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11221531224 is a wasteful number, since it uses less digits than its factorization.

11221531224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48932 (or 48928 counting only the distinct ones).

The product of its digits is 960, while the sum is 24.

The spelling of 11221531224 in words is "eleven billion, two hundred twenty-one million, five hundred thirty-one thousand, two hundred twenty-four".