1003131012120 has 128 divisors (see below), whose sum is σ = 3039325286400. Its totient is φ = 264842187264.

The previous prime is 1003131011999. The next prime is 1003131012167. The reversal of 1003131012120 is 212101313001.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1003131012120.

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, 78961689 + ... + 78974391.

It is an arithmetic number, because the mean of its divisors is an integer number (23744728800).

Almost surely, 2^{1003131012120} is an apocalyptic number.

1003131012120 is a gapful number since it is divisible by the number (10) 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 1003131012120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1519662643200).

1003131012120 is an abundant number, since it is smaller than the sum of its proper divisors (2036194274280).

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

1003131012120 is a wasteful number, since it uses less digits than its factorization.

1003131012120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19209 (or 19205 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 1003131012120 its reverse (212101313001), we get a palindrome (1215232325121).

The spelling of 1003131012120 in words is "one trillion, three billion, one hundred thirty-one million, twelve thousand, one hundred twenty".