111101221110 has 192 divisors, whose sum is σ = 319156588800. Its totient is φ = 24635761920.

The previous prime is 111101221093. The next prime is 111101221117. The reversal of 111101221110 is 11122101111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111101221117) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1972357 + ... + 2027903.

It is an arithmetic number, because the mean of its divisors is an integer number (1662273900).

Almost surely, 2^111101221110 is an apocalyptic number.

111101221110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 111101221110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159578294400).

111101221110 is an abundant number, since it is smaller than the sum of its proper divisors (208055367690).

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

111101221110 is a wasteful number, since it uses less digits than its factorization.

111101221110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55627 (or 55616 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 111101221110 its reverse (11122101111), we get a palindrome (122223322221).

The spelling of 111101221110 in words is "one hundred eleven billion, one hundred one million, two hundred twenty-one thousand, one hundred ten".