1303320120312 has 128 divisors (see below), whose sum is σ = 3753308528640. Its totient is φ = 369425197440.

The previous prime is 1303320120173. The next prime is 1303320120343. The reversal of 1303320120312 is 2130210233031.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 100504053 + ... + 100517019.

It is an arithmetic number, because the mean of its divisors is an integer number (29322722880).

Almost surely, 2^{1303320120312} is an apocalyptic number.

1303320120312 is a gapful number since it is divisible by the number (12) 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 1303320120312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1876654264320).

1303320120312 is an abundant number, since it is smaller than the sum of its proper divisors (2449988408328).

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

1303320120312 is a wasteful number, since it uses less digits than its factorization.

1303320120312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17681 (or 17677 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 1303320120312 its reverse (2130210233031), we get a palindrome (3433530353343).

The spelling of 1303320120312 in words is "one trillion, three hundred three billion, three hundred twenty million, one hundred twenty thousand, three hundred twelve".