1003121001020 has 48 divisors (see below), whose sum is σ = 2157421573440. Its totient is φ = 391637815296.

The previous prime is 1003121001017. The next prime is 1003121001049. The reversal of 1003121001020 is 201001213001.

It is a junction number, because it is equal to n+sod(n) for n = 1003121000992 and 1003121001010.

It is a congruent number.

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, 2247080 + ... + 2656239.

It is an arithmetic number, because the mean of its divisors is an integer number (44946282780).

Almost surely, 2^{1003121001020} is an apocalyptic number.

1003121001020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1003121001020 is an abundant number, since it is smaller than the sum of its proper divisors (1154300572420).

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

1003121001020 is a wasteful number, since it uses less digits than its factorization.

1003121001020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4903574 (or 4903572 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 1003121001020 its reverse (201001213001), we get a palindrome (1204122214021).

The spelling of 1003121001020 in words is "one trillion, three billion, one hundred twenty-one million, one thousand, twenty".