111211221222200 has 48 divisors (see below), whose sum is σ = 282072097469160. Its totient is φ = 40440444080000.

The previous prime is 111211221222181. The next prime is 111211221222203. The reversal of 111211221222200 is 2222122112111.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111211221222203) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 25275275351 + ... + 25275279750.

Almost surely, 2^{111211221222200} is an apocalyptic number.

111211221222200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111211221222200 is an abundant number, since it is smaller than the sum of its proper divisors (170860876246960).

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

111211221222200 is a wasteful number, since it uses less digits than its factorization.

111211221222200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50550555128 (or 50550555119 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 111211221222200 its reverse (2222122112111), we get a palindrome (113433343334311).

The spelling of 111211221222200 in words is "one hundred eleven trillion, two hundred eleven billion, two hundred twenty-one million, two hundred twenty-two thousand, two hundred".