1103003021321 has 2 divisors, whose sum is σ = 1103003021322. Its totient is φ = 1103003021320.

The previous prime is 1103003021213. The next prime is 1103003021371. The reversal of 1103003021321 is 1231203003011.

Together with previous prime (1103003021213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1024862646025 + 78140375296 = 1012355^2 + 279536^2 .

It is a cyclic number.

It is not a de Polignac number, because 1103003021321 - 2³⁰ = 1101929279497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1103003021321.

It is not a weakly prime, because it can be changed into another prime (1103003021371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 551501510660 + 551501510661.

It is an arithmetic number, because the mean of its divisors is an integer number (551501510661).

Almost surely, 2^{1103003021321} is an apocalyptic number.

It is an amenable number.

1103003021321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1103003021321 is an equidigital number, since it uses as much as digits as its factorization.

1103003021321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 1103003021321 its reverse (1231203003011), we get a palindrome (2334206024332).

The spelling of 1103003021321 in words is "one trillion, one hundred three billion, three million, twenty-one thousand, three hundred twenty-one".