111220221220002 has 96 divisors (see below), whose sum is σ = 255692757580416. Its totient is φ = 34864332940800.

The previous prime is 111220221219971. The next prime is 111220221220021. The reversal of 111220221220002 is 200022122022111.

It is a happy number.

111220221220002 is a `hidden beast` number, since 1 + 1 + 1 + 220 + 221 + 220 + 0 + 0 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 54635002 + ... + 56634122.

It is an arithmetic number, because the mean of its divisors is an integer number (2663466224796).

Almost surely, 2^{111220221220002} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111220221220002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127846378790208).

111220221220002 is an abundant number, since it is smaller than the sum of its proper divisors (144472536360414).

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

111220221220002 is a wasteful number, since it uses less digits than its factorization.

111220221220002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2001416 (or 2001413 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 111220221220002 its reverse (200022122022111), we get a palindrome (311242343242113).

The spelling of 111220221220002 in words is "one hundred eleven trillion, two hundred twenty billion, two hundred twenty-one million, two hundred twenty thousand, two".