111201221221110 has 64 divisors (see below), whose sum is σ = 299307960000000. Its totient is φ = 29376521984736.

The previous prime is 111201221221109. The next prime is 111201221221133. The reversal of 111201221221110 is 11122122102111.

It is a happy number.

111201221221110 is a `hidden beast` number, since 1 + 11 + 201 + 221 + 221 + 1 + 10 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1924533610 + ... + 1924591389.

It is an arithmetic number, because the mean of its divisors is an integer number (4676686875000).

Almost surely, 2^{111201221221110} is an apocalyptic number.

111201221221110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111201221221110 is an abundant number, since it is smaller than the sum of its proper divisors (188106738778890).

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

111201221221110 is a wasteful number, since it uses less digits than its factorization.

111201221221110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3849125122 (or 3849125116 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 111201221221110 its reverse (11122122102111), we get a palindrome (122323343323221).

The spelling of 111201221221110 in words is "one hundred eleven trillion, two hundred one billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred ten".