1111011111220 has 48 divisors (see below), whose sum is σ = 2370086466048. Its totient is φ = 437385553920.

The previous prime is 1111011111163. The next prime is 1111011111227. The reversal of 1111011111220 is 221111101111.

It is a self number, because there is not a number n which added to its sum of digits gives 1111011111220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111011111227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141349 + ... + 1497331.

It is an arithmetic number, because the mean of its divisors is an integer number (49376801376).

Almost surely, 2^{1111011111220} is an apocalyptic number.

1111011111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111011111220 is an abundant number, since it is smaller than the sum of its proper divisors (1259075354828).

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

1111011111220 is a wasteful number, since it uses less digits than its factorization.

1111011111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1356640 (or 1356638 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 1111011111220 its reverse (221111101111), we get a palindrome (1332122212331).

The spelling of 1111011111220 in words is "one trillion, one hundred eleven billion, eleven million, one hundred eleven thousand, two hundred twenty".