111221100001200 has 120 divisors (see below), whose sum is σ = 407175150892288. Its totient is φ = 25421965712640.

The previous prime is 111221100001163. The next prime is 111221100001229. The reversal of 111221100001200 is 2100001122111.

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 (12).

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 23 ways as a sum of consecutive naturals, for example, 6620295172 + ... + 6620311971.

Almost surely, 2^{111221100001200} is an apocalyptic number.

111221100001200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111221100001200 is an abundant number, since it is smaller than the sum of its proper divisors (295954050891088).

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

111221100001200 is a wasteful number, since it uses less digits than its factorization.

111221100001200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13240607171 (or 13240607160 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 111221100001200 its reverse (2100001122111), we get a palindrome (113321101123311).

The spelling of 111221100001200 in words is "one hundred eleven trillion, two hundred twenty-one billion, one hundred million, one thousand, two hundred".