1312031020 has 12 divisors (see below), whose sum is σ = 2755265184. Its totient is φ = 524812400.

The previous prime is 1312031009. The next prime is 1312031023. The reversal of 1312031020 is 201302131.

It is not an unprimeable number, because it can be changed into a prime (1312031023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32800756 + ... + 32800795.

It is an arithmetic number, because the mean of its divisors is an integer number (229605432).

Almost surely, 2^1312031020 is an apocalyptic number.

1312031020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312031020 is an abundant number, since it is smaller than the sum of its proper divisors (1443234164).

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

1312031020 is a wasteful number, since it uses less digits than its factorization.

1312031020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65601560 (or 65601558 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1312031020 is about 36221.9687482610. The cubic root of 1312031020 is about 1094.7493626502.

Adding to 1312031020 its reverse (201302131), we get a palindrome (1513333151).

The spelling of 1312031020 in words is "one billion, three hundred twelve million, thirty-one thousand, twenty".