1312123201320 has 64 divisors (see below), whose sum is σ = 4107516117120. Its totient is φ = 334686497024.

The previous prime is 1312123201289. The next prime is 1312123201349. The reversal of 1312123201320 is 231023212131.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 237700719 + ... + 237706238.

It is an arithmetic number, because the mean of its divisors is an integer number (64179939330).

Almost surely, 2^{1312123201320} is an apocalyptic number.

1312123201320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312123201320 is an abundant number, since it is smaller than the sum of its proper divisors (2795392915800).

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

1312123201320 is a wasteful number, since it uses less digits than its factorization.

1312123201320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475406994 (or 475406990 counting only the distinct ones).

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

Adding to 1312123201320 its reverse (231023212131), we get a palindrome (1543146413451).

The spelling of 1312123201320 in words is "one trillion, three hundred twelve billion, one hundred twenty-three million, two hundred one thousand, three hundred twenty".