31320313103203 has 4 divisors (see below), whose sum is σ = 31320324366568. Its totient is φ = 31320301839840.

The previous prime is 31320313103141. The next prime is 31320313103213. The reversal of 31320313103203 is 30230131302313.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 31320313103203 - 2²⁹ = 31319776232291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31320313103213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1872475 + ... + 8133067.

It is an arithmetic number, because the mean of its divisors is an integer number (7830081091642).

Almost surely, 2^{31320313103203} is an apocalyptic number.

31320313103203 is a deficient number, since it is larger than the sum of its proper divisors (11263365).

31320313103203 is an equidigital number, since it uses as much as digits as its factorization.

31320313103203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11263364.

The product of its (nonzero) digits is 2916, while the sum is 25.

Adding to 31320313103203 its reverse (30230131302313), we get a palindrome (61550444405516).

The spelling of 31320313103203 in words is "thirty-one trillion, three hundred twenty billion, three hundred thirteen million, one hundred three thousand, two hundred three".