1312110020 has 24 divisors (see below), whose sum is σ = 2967387864. Its totient is φ = 484471296.

The previous prime is 1312110013. The next prime is 1312110043. The reversal of 1312110020 is 200112131.

It can be written as a sum of positive squares in 4 ways, for example, as 28751044 + 1283358976 = 5362^2 + 35824^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1312109983 and 1312110010.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2523029 + ... + 2523548.

It is an arithmetic number, because the mean of its divisors is an integer number (123641161).

Almost surely, 2^1312110020 is an apocalyptic number.

1312110020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312110020 is an abundant number, since it is smaller than the sum of its proper divisors (1655277844).

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

1312110020 is a wasteful number, since it uses less digits than its factorization.

1312110020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5046599 (or 5046597 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1312110020 is about 36223.0592302748. The cubic root of 1312110020 is about 1094.7713345555.

Adding to 1312110020 its reverse (200112131), we get a palindrome (1512222151).

The spelling of 1312110020 in words is "one billion, three hundred twelve million, one hundred ten thousand, twenty".