1313221003123 has 2 divisors, whose sum is σ = 1313221003124. Its totient is φ = 1313221003122.

The previous prime is 1313221003121. The next prime is 1313221003139. The reversal of 1313221003123 is 3213001223131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1313221003123 - 2¹ = 1313221003121 is a prime.

Together with 1313221003121, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1313221003094 and 1313221003103.

It is not a weakly prime, because it can be changed into another prime (1313221003121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656610501561 + 656610501562.

It is an arithmetic number, because the mean of its divisors is an integer number (656610501562).

Almost surely, 2^{1313221003123} is an apocalyptic number.

1313221003123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313221003123 is an equidigital number, since it uses as much as digits as its factorization.

1313221003123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 1313221003123 its reverse (3213001223131), we get a palindrome (4526222226254).

The spelling of 1313221003123 in words is "one trillion, three hundred thirteen billion, two hundred twenty-one million, three thousand, one hundred twenty-three".