1111311020 has 48 divisors (see below), whose sum is σ = 2378224800. Its totient is φ = 436085760.

The previous prime is 1111311011. The next prime is 1111311031. The reversal of 1111311020 is 201131111.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1111310992 and 1111311010.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1039046 + ... + 1040114.

It is an arithmetic number, because the mean of its divisors is an integer number (49546350).

Almost surely, 2^1111311020 is an apocalyptic number.

1111311020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111311020 is an abundant number, since it is smaller than the sum of its proper divisors (1266913780).

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

1111311020 is a wasteful number, since it uses less digits than its factorization.

1111311020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2018 (or 2016 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 1111311020 is about 33336.3318318018. The cubic root of 1111311020 is about 1035.8062812662.

Adding to 1111311020 its reverse (201131111), we get a palindrome (1312442131).

It can be divided in two parts, 111 and 1311020, that added together give a palindrome (1311131).

The spelling of 1111311020 in words is "one billion, one hundred eleven million, three hundred eleven thousand, twenty".