1312220312320 has 72 divisors (see below), whose sum is σ = 3174298601040. Its totient is φ = 519691161600.

The previous prime is 1312220312281. The next prime is 1312220312321. The reversal of 1312220312320 is 232130222131.

It is a junction number, because it is equal to n+sod(n) for n = 1312220312291 and 1312220312300.

It is not an unprimeable number, because it can be changed into a prime (1312220312321) 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 7 ways as a sum of consecutive naturals, for example, 4945830 + ... + 5204389.

It is an arithmetic number, because the mean of its divisors is an integer number (44087480570).

Almost surely, 2^{1312220312320} is an apocalyptic number.

1312220312320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312220312320 is an abundant number, since it is smaller than the sum of its proper divisors (1862078288720).

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

1312220312320 is a wasteful number, since it uses less digits than its factorization.

1312220312320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10150341 (or 10150327 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 1312220312320 its reverse (232130222131), we get a palindrome (1544350534451).

The spelling of 1312220312320 in words is "one trillion, three hundred twelve billion, two hundred twenty million, three hundred twelve thousand, three hundred twenty".