1003123311320 has 64 divisors (see below), whose sum is σ = 2431860973920. Its totient is φ = 370198692864.

The previous prime is 1003123311317. The next prime is 1003123311329. The reversal of 1003123311320 is 231133213001.

1003123311320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 = 1003123311292 and 1003123311301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1003123311329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 560012 + ... + 1523108.

Almost surely, 2^{1003123311320} is an apocalyptic number.

1003123311320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1003123311320 is an abundant number, since it is smaller than the sum of its proper divisors (1428737662600).

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

1003123311320 is a wasteful number, since it uses less digits than its factorization.

1003123311320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965124 (or 965120 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 1003123311320 its reverse (231133213001), we get a palindrome (1234256524321).

The spelling of 1003123311320 in words is "one trillion, three billion, one hundred twenty-three million, three hundred eleven thousand, three hundred twenty".