1321312113203 has 2 divisors, whose sum is σ = 1321312113204. Its totient is φ = 1321312113202.

The previous prime is 1321312113161. The next prime is 1321312113223. The reversal of 1321312113203 is 3023112131231.

It is a strong prime.

It is an emirp because it is prime and its reverse (3023112131231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1321312113203 - 2¹² = 1321312109107 is a prime.

It is not a weakly prime, because it can be changed into another prime (1321312113223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660656056601 + 660656056602.

It is an arithmetic number, because the mean of its divisors is an integer number (660656056602).

Almost surely, 2^{1321312113203} is an apocalyptic number.

1321312113203 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321312113203 is an equidigital number, since it uses as much as digits as its factorization.

1321312113203 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 23.

Adding to 1321312113203 its reverse (3023112131231), we get a palindrome (4344424244434).

The spelling of 1321312113203 in words is "one trillion, three hundred twenty-one billion, three hundred twelve million, one hundred thirteen thousand, two hundred three".