31103313123203 has 4 divisors (see below), whose sum is σ = 31111153639680. Its totient is φ = 31095472606728.

The previous prime is 31103313123167. The next prime is 31103313123227. The reversal of 31103313123203 is 30232131330113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31103313123203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31103313123283) 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, 3920252288 + ... + 3920260221.

It is an arithmetic number, because the mean of its divisors is an integer number (7777788409920).

Almost surely, 2^{31103313123203} is an apocalyptic number.

31103313123203 is a deficient number, since it is larger than the sum of its proper divisors (7840516477).

31103313123203 is an equidigital number, since it uses as much as digits as its factorization.

31103313123203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7840516476.

The product of its (nonzero) digits is 2916, while the sum is 26.

Adding to 31103313123203 its reverse (30232131330113), we get a palindrome (61335444453316).

The spelling of 31103313123203 in words is "thirty-one trillion, one hundred three billion, three hundred thirteen million, one hundred twenty-three thousand, two hundred three".