1321321120103 has 2 divisors, whose sum is σ = 1321321120104. Its totient is φ = 1321321120102.

The previous prime is 1321321120079. The next prime is 1321321120111. The reversal of 1321321120103 is 3010211231231.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1321321120103 - 2⁴⁰ = 221809492327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321321120403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660660560051 + 660660560052.

It is an arithmetic number, because the mean of its divisors is an integer number (660660560052).

Almost surely, 2^{1321321120103} is an apocalyptic number.

1321321120103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321321120103 is an equidigital number, since it uses as much as digits as its factorization.

1321321120103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1321321120103 its reverse (3010211231231), we get a palindrome (4331532351334).

The spelling of 1321321120103 in words is "one trillion, three hundred twenty-one billion, three hundred twenty-one million, one hundred twenty thousand, one hundred three".