1111111222220 has 24 divisors (see below), whose sum is σ = 2470588483104. Its totient is φ = 418300695296.

The previous prime is 1111111222219. The next prime is 1111111222229. The reversal of 1111111222220 is 222221111111.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (1111111222229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1633986752 + ... + 1633987431.

It is an arithmetic number, because the mean of its divisors is an integer number (102941186796).

Almost surely, 2^{1111111222220} is an apocalyptic number.

1111111222220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111111222220 is an abundant number, since it is smaller than the sum of its proper divisors (1359477260884).

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

1111111222220 is a wasteful number, since it uses less digits than its factorization.

1111111222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3267974209 (or 3267974207 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1111111222220 its reverse (222221111111), we get a palindrome (1333332333331).

It can be divided in two parts, 1111111 and 222220, that added together give a palindrome (1333331).

The spelling of 1111111222220 in words is "one trillion, one hundred eleven billion, one hundred eleven million, two hundred twenty-two thousand, two hundred twenty".