111201221121100 has 72 divisors (see below), whose sum is σ = 263250461392128. Its totient is φ = 40435756468800.

The previous prime is 111201221121079. The next prime is 111201221121103. The reversal of 111201221121100 is 1121122102111.

It is not an unprimeable number, because it can be changed into a prime (111201221121103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41657209 + ... + 44246191.

It is an arithmetic number, because the mean of its divisors is an integer number (3656256408224).

Almost surely, 2^{111201221121100} is an apocalyptic number.

111201221121100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111201221121100 is an abundant number, since it is smaller than the sum of its proper divisors (152049240271028).

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

111201221121100 is a wasteful number, since it uses less digits than its factorization.

111201221121100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2628055 (or 2628048 counting only the distinct ones).

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

Adding to 111201221121100 its reverse (1121122102111), we get a palindrome (112322343223211).

The spelling of 111201221121100 in words is "one hundred eleven trillion, two hundred one billion, two hundred twenty-one million, one hundred twenty-one thousand, one hundred".