31112213313103 has 16 divisors (see below), whose sum is σ = 33736538997280. Its totient is φ = 28521530649216.

The previous prime is 31112213313089. The next prime is 31112213313191. The reversal of 31112213313103 is 30131331221113.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31112213313103 is a prime.

It is a super-2 number, since 2×31112213313103² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31112213373103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11980425 + ... + 14344162.

It is an arithmetic number, because the mean of its divisors is an integer number (2108533687330).

Almost surely, 2^{31112213313103} is an apocalyptic number.

31112213313103 is a deficient number, since it is larger than the sum of its proper divisors (2624325684177).

31112213313103 is a wasteful number, since it uses less digits than its factorization.

31112213313103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26325226.

The product of its (nonzero) digits is 972, while the sum is 25.

Adding to 31112213313103 its reverse (30131331221113), we get a palindrome (61243544534216).

The spelling of 31112213313103 in words is "thirty-one trillion, one hundred twelve billion, two hundred thirteen million, three hundred thirteen thousand, one hundred three".