13131321120240 has 80 divisors (see below), whose sum is σ = 42110788442400. Its totient is φ = 3380937849856.

The previous prime is 13131321120223. The next prime is 13131321120241. The reversal of 13131321120240 is 4202112313131.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×13131321120240² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 13131321120240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13131321120241) 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, 943335075 + ... + 943348994.

It is an arithmetic number, because the mean of its divisors is an integer number (526384855530).

Almost surely, 2^{13131321120240} is an apocalyptic number.

13131321120240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13131321120240 is an abundant number, since it is smaller than the sum of its proper divisors (28979467322160).

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

13131321120240 is a wasteful number, since it uses less digits than its factorization.

13131321120240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1886684114 (or 1886684108 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 13131321120240 its reverse (4202112313131), we get a palindrome (17333433433371).

The spelling of 13131321120240 in words is "thirteen trillion, one hundred thirty-one billion, three hundred twenty-one million, one hundred twenty thousand, two hundred forty".