1310203021020 has 96 divisors (see below), whose sum is σ = 3931532978688. Its totient is φ = 325164356352.

The previous prime is 1310203021019. The next prime is 1310203021027. The reversal of 1310203021020 is 201203020131.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1310203021027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12778974 + ... + 12881093.

It is an arithmetic number, because the mean of its divisors is an integer number (40953468528).

Almost surely, 2^{1310203021020} is an apocalyptic number.

1310203021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1310203021020 is an abundant number, since it is smaller than the sum of its proper divisors (2621329957668).

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

1310203021020 is a wasteful number, since it uses less digits than its factorization.

1310203021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25660139 (or 25660137 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 1310203021020 its reverse (201203020131), we get a palindrome (1511406041151).

The spelling of 1310203021020 in words is "one trillion, three hundred ten billion, two hundred three million, twenty-one thousand, twenty".