11221222000 has 40 divisors (see below), whose sum is σ = 27132919632. Its totient is φ = 4488488000.

The previous prime is 11221221961. The next prime is 11221222007. The reversal of 11221222000 is 22212211.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221222007) 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, 2803306 + ... + 2807305.

Almost surely, 2^11221222000 is an apocalyptic number.

11221222000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11221222000 is an abundant number, since it is smaller than the sum of its proper divisors (15911697632).

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

11221222000 is an equidigital number, since it uses as much as digits as its factorization.

11221222000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5610634 (or 5610618 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 11221222000 its reverse (22212211), we get a palindrome (11243434211).

The spelling of 11221222000 in words is "eleven billion, two hundred twenty-one million, two hundred twenty-two thousand".