1111112222220 has 576 divisors, whose sum is σ = 4647589180416. Its totient is φ = 207359170560.

The previous prime is 1111112222201. The next prime is 1111112222221. The reversal of 1111112222220 is 222222111111.

1111112222220 is a `hidden beast` number, since 1 + 111 + 112 + 222 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1111112222193 and 1111112222202.

It is not an unprimeable number, because it can be changed into a prime (1111112222221) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 6583327 + ... + 6749993.

It is an arithmetic number, because the mean of its divisors is an integer number (8068731216).

Almost surely, 2^{1111112222220} is an apocalyptic number.

1111112222220 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 1111112222220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2323794590208).

1111112222220 is an abundant number, since it is smaller than the sum of its proper divisors (3536476958196).

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

1111112222220 is a wasteful number, since it uses less digits than its factorization.

1111112222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166750 (or 166745 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1111112222220 its reverse (222222111111), we get a palindrome (1333334333331).

The spelling of 1111112222220 in words is "one trillion, one hundred eleven billion, one hundred twelve million, two hundred twenty-two thousand, two hundred twenty".