13020031321020 has 120 divisors (see below), whose sum is σ = 40847081939664. Its totient is φ = 3471773612544.

The previous prime is 13020031320937. The next prime is 13020031321043. The reversal of 13020031321020 is 2012313002031.

13020031321020 is a `hidden beast` number, since 130 + 200 + 313 + 2 + 1 + 0 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 13020031320984 and 13020031321002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 24387459 + ... + 24915621.

Almost surely, 2^{13020031321020} is an apocalyptic number.

13020031321020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13020031321020 is an abundant number, since it is smaller than the sum of its proper divisors (27827050618644).

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

13020031321020 is a wasteful number, since it uses less digits than its factorization.

13020031321020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543401 (or 543390 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 13020031321020 its reverse (2012313002031), we get a palindrome (15032344323051).

The spelling of 13020031321020 in words is "thirteen trillion, twenty billion, thirty-one million, three hundred twenty-one thousand, twenty".