111221201201100 has 36 divisors (see below), whose sum is σ = 321800008809384. Its totient is φ = 29658986986880.

The previous prime is 111221201201087. The next prime is 111221201201101. The reversal of 111221201201100 is 1102102122111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 111221201201100.

It is not an unprimeable number, because it can be changed into a prime (111221201201101) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 185368668369 + ... + 185368668968.

It is an arithmetic number, because the mean of its divisors is an integer number (8938889133594).

Almost surely, 2^{111221201201100} is an apocalyptic number.

111221201201100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111221201201100 is an abundant number, since it is smaller than the sum of its proper divisors (210578807608284).

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

111221201201100 is a wasteful number, since it uses less digits than its factorization.

111221201201100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370737337354 (or 370737337347 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 111221201201100 its reverse (1102102122111), we get a palindrome (112323303323211).

The spelling of 111221201201100 in words is "one hundred eleven trillion, two hundred twenty-one billion, two hundred one million, two hundred one thousand, one hundred".