1301321220320 has 48 divisors (see below), whose sum is σ = 3353859695088. Its totient is φ = 473207715840.

The previous prime is 1301321220281. The next prime is 1301321220337. The reversal of 1301321220320 is 230221231031.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1301321220292 and 1301321220301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 369691769 + ... + 369695288.

It is an arithmetic number, because the mean of its divisors is an integer number (69872076981).

Almost surely, 2^{1301321220320} is an apocalyptic number.

1301321220320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1301321220320 is an abundant number, since it is smaller than the sum of its proper divisors (2052538474768).

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

1301321220320 is a wasteful number, since it uses less digits than its factorization.

1301321220320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739387083 (or 739387075 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 1301321220320 its reverse (230221231031), we get a palindrome (1531542451351).

The spelling of 1301321220320 in words is "one trillion, three hundred one billion, three hundred twenty-one million, two hundred twenty thousand, three hundred twenty".