31103111330213 has 6 divisors (see below), whose sum is σ = 33679700434674. Its totient is φ = 28710564304656.

The previous prime is 31103111330209. The next prime is 31103111330273. The reversal of 31103111330213 is 31203311130113.

It can be written as a sum of positive squares in 3 ways, for example, as 11703345124 + 31091407985089 = 108182^2 + 5575967^2 .

It is not a de Polignac number, because 31103111330213 - 2² = 31103111330209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31103111330273) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 92021039270 + ... + 92021039607.

It is an arithmetic number, because the mean of its divisors is an integer number (5613283405779).

Almost surely, 2^{31103111330213} is an apocalyptic number.

It is an amenable number.

31103111330213 is a deficient number, since it is larger than the sum of its proper divisors (2576589104461).

31103111330213 is a wasteful number, since it uses less digits than its factorization.

31103111330213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184042078903 (or 184042078890 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 23.

Adding to 31103111330213 its reverse (31203311130113), we get a palindrome (62306422460326).

The spelling of 31103111330213 in words is "thirty-one trillion, one hundred three billion, one hundred eleven million, three hundred thirty thousand, two hundred thirteen".