1111220220 has 48 divisors (see below), whose sum is σ = 3394274688. Its totient is φ = 269386560.

The previous prime is 1111220213. The next prime is 1111220221. The reversal of 1111220220 is 220221111.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1111220196 and 1111220205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111220221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 841174 + ... + 842493.

It is an arithmetic number, because the mean of its divisors is an integer number (70714056).

Almost surely, 2^1111220220 is an apocalyptic number.

1111220220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111220220 is an abundant number, since it is smaller than the sum of its proper divisors (2283054468).

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

1111220220 is a wasteful number, since it uses less digits than its factorization.

1111220220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1683690 (or 1683688 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1111220220 is about 33334.9699264901. The cubic root of 1111220220 is about 1035.7780702102.

Adding to 1111220220 its reverse (220221111), we get a palindrome (1331441331).

The spelling of 1111220220 in words is "one billion, one hundred eleven million, two hundred twenty thousand, two hundred twenty".