1031003321020 has 12 divisors (see below), whose sum is σ = 2165106974184. Its totient is φ = 412401328400.

The previous prime is 1031003320951. The next prime is 1031003321021. The reversal of 1031003321020 is 201233001301.

It is a junction number, because it is equal to n+sod(n) for n = 1031003320985 and 1031003321003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031003321021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25775083006 + ... + 25775083045.

It is an arithmetic number, because the mean of its divisors is an integer number (180425581182).

Almost surely, 2^{1031003321020} is an apocalyptic number.

1031003321020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1031003321020 is an abundant number, since it is smaller than the sum of its proper divisors (1134103653164).

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

1031003321020 is a wasteful number, since it uses less digits than its factorization.

1031003321020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51550166060 (or 51550166058 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 1031003321020 its reverse (201233001301), we get a palindrome (1232236322321).

The spelling of 1031003321020 in words is "one trillion, thirty-one billion, three million, three hundred twenty-one thousand, twenty".