1321131003000 has 128 divisors (see below), whose sum is σ = 4171591307520. Its totient is φ = 348056937600.

The previous prime is 1321131002981. The next prime is 1321131003013. The reversal of 1321131003000 is 3001311231.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 2403874 + ... + 2901873.

It is an arithmetic number, because the mean of its divisors is an integer number (32590557090).

Almost surely, 2^{1321131003000} is an apocalyptic number.

1321131003000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321131003000 is an abundant number, since it is smaller than the sum of its proper divisors (2850460304520).

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

1321131003000 is a wasteful number, since it uses less digits than its factorization.

1321131003000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5305854 (or 5305840 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 1321131003000 its reverse (3001311231), we get a palindrome (1324132314231).

The spelling of 1321131003000 in words is "one trillion, three hundred twenty-one billion, one hundred thirty-one million, three thousand".