1311110220 has 48 divisors (see below), whose sum is σ = 4195554048. Its totient is φ = 299682240.

The previous prime is 1311110183. The next prime is 1311110231. The reversal of 1311110220 is 220111131.

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 = 1311110196 and 1311110205.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1560426 + ... + 1561265.

It is an arithmetic number, because the mean of its divisors is an integer number (87407376).

Almost surely, 2^1311110220 is an apocalyptic number.

1311110220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311110220 is an abundant number, since it is smaller than the sum of its proper divisors (2884443828).

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

1311110220 is a wasteful number, since it uses less digits than its factorization.

1311110220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3121710 (or 3121708 counting only the distinct ones).

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

The square root of 1311110220 is about 36209.2559989846. The cubic root of 1311110220 is about 1094.4931997218.

Adding to 1311110220 its reverse (220111131), we get a palindrome (1531221351).

The spelling of 1311110220 in words is "one billion, three hundred eleven million, one hundred ten thousand, two hundred twenty".