111222220100 has 72 divisors (see below), whose sum is σ = 254339846208. Its totient is φ = 42133168000.

The previous prime is 111222220099. The next prime is 111222220117. The reversal of 111222220100 is 1022222111.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7094 + ... + 471693.

It is an arithmetic number, because the mean of its divisors is an integer number (3532497864).

Almost surely, 2^111222220100 is an apocalyptic number.

111222220100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111222220100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127169923104).

111222220100 is an abundant number, since it is smaller than the sum of its proper divisors (143117626108).

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

111222220100 is a wasteful number, since it uses less digits than its factorization.

111222220100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478925 (or 478918 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 111222220100 its reverse (1022222111), we get a palindrome (112244442211).

The spelling of 111222220100 in words is "one hundred eleven billion, two hundred twenty-two million, two hundred twenty thousand, one hundred".