1300001021320 has 32 divisors (see below), whose sum is σ = 2933288455320. Its totient is φ = 518527313920.

The previous prime is 1300001021311. The next prime is 1300001021359. The reversal of 1300001021320 is 231201000031.

It can be written as a sum of positive squares in 4 ways, for example, as 1053550333476 + 246450687844 = 1026426^2 + 496438^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1300001021320.

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, 46019911 + ... + 46048150.

Almost surely, 2^{1300001021320} is an apocalyptic number.

1300001021320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1300001021320 is an abundant number, since it is smaller than the sum of its proper divisors (1633287434000).

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

1300001021320 is a wasteful number, since it uses less digits than its factorization.

1300001021320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92068425 (or 92068421 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 1300001021320 its reverse (231201000031), we get a palindrome (1531202021351).

The spelling of 1300001021320 in words is "one trillion, three hundred billion, one million, twenty-one thousand, three hundred twenty".