111220012220100 has 144 divisors (see below), whose sum is σ = 367845308476800. Its totient is φ = 25416339102720.

The previous prime is 111220012220087. The next prime is 111220012220137. The reversal of 111220012220100 is 1022210022111.

It is a super-2 number, since 2×111220012220100² (a number of 29 digits) contains 22 as substring.

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 111220012220100.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4331206 + ... + 15530594.

Almost surely, 2^{111220012220100} is an apocalyptic number.

111220012220100 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 111220012220100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183922654238400).

111220012220100 is an abundant number, since it is smaller than the sum of its proper divisors (256625296256700).

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

111220012220100 is a wasteful number, since it uses less digits than its factorization.

111220012220100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11204142 (or 11204135 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 111220012220100 its reverse (1022210022111), we get a palindrome (112242222242211).

The spelling of 111220012220100 in words is "one hundred eleven trillion, two hundred twenty billion, twelve million, two hundred twenty thousand, one hundred".