111111121121200 has 30 divisors (see below), whose sum is σ = 266944468494644. Its totient is φ = 44444448448320.

The previous prime is 111111121121173. The next prime is 111111121121207. The reversal of 111111121121200 is 2121121111111.

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

It is not an unprimeable number, because it can be changed into a prime (111111121121207) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 138888901002 + ... + 138888901801.

Almost surely, 2^{111111121121200} is an apocalyptic number.

111111121121200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111111121121200 is an abundant number, since it is smaller than the sum of its proper divisors (155833347373444).

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

111111121121200 is a wasteful number, since it uses less digits than its factorization.

111111121121200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277777802821 (or 277777802810 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 111111121121200 its reverse (2121121111111), we get a palindrome (113232242232311).

The spelling of 111111121121200 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred".