11112221220000 has 120 divisors (see below), whose sum is σ = 36450308242656. Its totient is φ = 2963258976000.

The previous prime is 11112221219987. The next prime is 11112221220007. The reversal of 11112221220000 is 2212221111.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (11112221220007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 92541844 + ... + 92661843.

Almost surely, 2^{11112221220000} is an apocalyptic number.

11112221220000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11112221220000 is an abundant number, since it is smaller than the sum of its proper divisors (25338087022656).

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

11112221220000 is an equidigital number, since it uses as much as digits as its factorization.

11112221220000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185203720 (or 185203697 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 11112221220000 its reverse (2212221111), we get a palindrome (11114433441111).

The spelling of 11112221220000 in words is "eleven trillion, one hundred twelve billion, two hundred twenty-one million, two hundred twenty thousand".