1313221201320 has 256 divisors, whose sum is σ = 4864618944000. Its totient is φ = 282507939840.

The previous prime is 1313221201283. The next prime is 1313221201321. The reversal of 1313221201320 is 231021223131.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1313221201321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 238671 + ... + 1638110.

It is an arithmetic number, because the mean of its divisors is an integer number (19002417750).

Almost surely, 2^{1313221201320} is an apocalyptic number.

1313221201320 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 1313221201320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2432309472000).

1313221201320 is an abundant number, since it is smaller than the sum of its proper divisors (3551397742680).

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

1313221201320 is a wasteful number, since it uses less digits than its factorization.

1313221201320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1876833 (or 1876815 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1313221201320 its reverse (231021223131), we get a palindrome (1544242424451).

The spelling of 1313221201320 in words is "one trillion, three hundred thirteen billion, two hundred twenty-one million, two hundred one thousand, three hundred twenty".