1311033020 has 48 divisors (see below), whose sum is σ = 3073327488. Its totient is φ = 465648960.

The previous prime is 1311033007. The next prime is 1311033023. The reversal of 1311033020 is 203301131.

It is a junction number, because it is equal to n+sod(n) for n = 1311032986 and 1311033004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311033023) 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, 59834 + ... + 78753.

It is an arithmetic number, because the mean of its divisors is an integer number (64027656).

Almost surely, 2^1311033020 is an apocalyptic number.

1311033020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311033020 is an abundant number, since it is smaller than the sum of its proper divisors (1762294468).

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

1311033020 is a wasteful number, since it uses less digits than its factorization.

1311033020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138650 (or 138648 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 1311033020 is about 36208.1899575220. The cubic root of 1311033020 is about 1094.4717175377.

Adding to 1311033020 its reverse (203301131), we get a palindrome (1514334151).

The spelling of 1311033020 in words is "one billion, three hundred eleven million, thirty-three thousand, twenty".