221112111220000 has 1440 divisors, whose sum is σ = 744824773478016. Its totient is φ = 62845009920000.

The previous prime is 221112111219991. The next prime is 221112111220027. The reversal of 221112111220000 is 22111211122.

It is a Harshad number since it is a multiple of its sum of digits (16).

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 239 ways as a sum of consecutive naturals, for example, 18278253952 + ... + 18278266048.

Almost surely, 2^{221112111220000} is an apocalyptic number.

221112111220000 is a gapful number since it is divisible by the number (20) 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 221112111220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (372412386739008).

221112111220000 is an abundant number, since it is smaller than the sum of its proper divisors (523712662258016).

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

221112111220000 is a wasteful number, since it uses less digits than its factorization.

221112111220000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12252 (or 12218 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221112111220000 its reverse (22111211122), we get a palindrome (221134222431122).

221112111220000 divided by its reverse (22111211122) gives a 4-th power (10000 = 10⁴).

The spelling of 221112111220000 in words is "two hundred twenty-one trillion, one hundred twelve billion, one hundred eleven million, two hundred twenty thousand".