13131000323220 has 192 divisors, whose sum is σ = 40707870787584. Its totient is φ = 3142113569280.

The previous prime is 13131000323209. The next prime is 13131000323227. The reversal of 13131000323220 is 2232300013131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13131000323227) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6149209 + ... + 8004671.

It is an arithmetic number, because the mean of its divisors is an integer number (212020160352).

Almost surely, 2^{13131000323220} is an apocalyptic number.

13131000323220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13131000323220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20353935393792).

13131000323220 is an abundant number, since it is smaller than the sum of its proper divisors (27576870464364).

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

13131000323220 is a wasteful number, since it uses less digits than its factorization.

13131000323220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1855742 (or 1855740 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 13131000323220 its reverse (2232300013131), we get a palindrome (15363300336351).

The spelling of 13131000323220 in words is "thirteen trillion, one hundred thirty-one billion, three hundred twenty-three thousand, two hundred twenty".