321513325103 has 2 divisors, whose sum is σ = 321513325104. Its totient is φ = 321513325102.

The previous prime is 321513325057. The next prime is 321513325123. The reversal of 321513325103 is 301523315123.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (301523315123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 321513325103 - 2²² = 321509130799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321513325123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160756662551 + 160756662552.

It is an arithmetic number, because the mean of its divisors is an integer number (160756662552).

Almost surely, 2^321513325103 is an apocalyptic number.

321513325103 is a deficient number, since it is larger than the sum of its proper divisors (1).

321513325103 is an equidigital number, since it uses as much as digits as its factorization.

321513325103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8100, while the sum is 29.

The spelling of 321513325103 in words is "three hundred twenty-one billion, five hundred thirteen million, three hundred twenty-five thousand, one hundred three".