1003003123421 has 8 divisors (see below), whose sum is σ = 1082029240824. Its totient is φ = 924244439040.

The previous prime is 1003003123417. The next prime is 1003003123453. The reversal of 1003003123421 is 1243213003001.

It can be written as a sum of positive squares in 4 ways, for example, as 429175663225 + 573827460196 = 655115^2 + 757514^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1003003123421 - 2² = 1003003123417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1003003123393 and 1003003123402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1003003123481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66850460 + ... + 66865461.

It is an arithmetic number, because the mean of its divisors is an integer number (135253655103).

Almost surely, 2^{1003003123421} is an apocalyptic number.

It is an amenable number.

1003003123421 is a deficient number, since it is larger than the sum of its proper divisors (79026117403).

1003003123421 is a wasteful number, since it uses less digits than its factorization.

1003003123421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133716511.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 1003003123421 its reverse (1243213003001), we get a palindrome (2246216126422).

The spelling of 1003003123421 in words is "one trillion, three billion, three million, one hundred twenty-three thousand, four hundred twenty-one".