1111221220120 has 32 divisors (see below), whose sum is σ = 2727542995920. Its totient is φ = 404080443520.

The previous prime is 1111221220111. The next prime is 1111221220121. The reversal of 1111221220120 is 210221221111.

It is a junction number, because it is equal to n+sod(n) for n = 1111221220094 and 1111221220103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111221220121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1262750947 + ... + 1262751826.

Almost surely, 2^{1111221220120} is an apocalyptic number.

1111221220120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111221220120 is an abundant number, since it is smaller than the sum of its proper divisors (1616321775800).

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

1111221220120 is a wasteful number, since it uses less digits than its factorization.

1111221220120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2525502795 (or 2525502791 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1111221220120 its reverse (210221221111), we get a palindrome (1321442441231).

Subtracting from 1111221220120 its reverse (210221221111), we obtain a palindrome (900999999009).

The spelling of 1111221220120 in words is "one trillion, one hundred eleven billion, two hundred twenty-one million, two hundred twenty thousand, one hundred twenty".