11221213332 has 96 divisors (see below), whose sum is σ = 31191236608. Its totient is φ = 3072795264.

The previous prime is 11221213301. The next prime is 11221213391. The reversal of 11221213332 is 23331212211.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 11221213299 and 11221213308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 181293 + ... + 235179.

Almost surely, 2^11221213332 is an apocalyptic number.

11221213332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11221213332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15595618304).

11221213332 is an abundant number, since it is smaller than the sum of its proper divisors (19970023276).

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

11221213332 is a wasteful number, since it uses less digits than its factorization.

11221213332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54005 (or 54003 counting only the distinct ones).

The product of its digits is 432, while the sum is 21.

Adding to 11221213332 its reverse (23331212211), we get a palindrome (34552425543).

The spelling of 11221213332 in words is "eleven billion, two hundred twenty-one million, two hundred thirteen thousand, three hundred thirty-two".