1001003003020 has 48 divisors (see below), whose sum is σ = 2216716558560. Its totient is φ = 378646354944.

The previous prime is 1001003003009. The next prime is 1001003003083. The reversal of 1001003003020 is 203003001001.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1001003002988 and 1001003003006.

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, 2152989 + ... + 2576308.

It is an arithmetic number, because the mean of its divisors is an integer number (46181594970).

Almost surely, 2^{1001003003020} is an apocalyptic number.

1001003003020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001003003020 is an abundant number, since it is smaller than the sum of its proper divisors (1215713555540).

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

1001003003020 is a wasteful number, since it uses less digits than its factorization.

1001003003020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4729882 (or 4729880 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 10.

Adding to 1001003003020 its reverse (203003001001), we get a palindrome (1204006004021).

The spelling of 1001003003020 in words is "one trillion, one billion, three million, three thousand, twenty".