111220100020000 has 60 divisors (see below), whose sum is σ = 273618129113406. Its totient is φ = 44488040000000.

The previous prime is 111220100019907. The next prime is 111220100020027. The reversal of 111220100020000 is 20001022111.

It can be written as a sum of positive squares in 5 ways, for example, as 434454993424 + 110785645026576 = 659132^2 + 10525476^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2780482501 + ... + 2780522500.

Almost surely, 2^{111220100020000} is an apocalyptic number.

111220100020000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111220100020000 is an abundant number, since it is smaller than the sum of its proper divisors (162398029093406).

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

111220100020000 is an frugal number, since it uses more digits than its factorization.

111220100020000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5561005031 (or 5561005008 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 111220100020000 its reverse (20001022111), we get a palindrome (111240101042111).

The spelling of 111220100020000 in words is "one hundred eleven trillion, two hundred twenty billion, one hundred million, twenty thousand".