31113122113 has 8 divisors (see below), whose sum is σ = 31188702248. Its totient is φ = 31037624064.

The previous prime is 31113122099. The next prime is 31113122123. The reversal of 31113122113 is 31122131113.

It can be written as a sum of positive squares in 4 ways, for example, as 12761543089 + 18351579024 = 112967^2 + 135468^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31113122113 - 2⁵ = 31113122081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31113122123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 775495 + ... + 814627.

It is an arithmetic number, because the mean of its divisors is an integer number (3898587781).

Almost surely, 2^31113122113 is an apocalyptic number.

It is an amenable number.

31113122113 is a deficient number, since it is larger than the sum of its proper divisors (75580135).

31113122113 is a wasteful number, since it uses less digits than its factorization.

31113122113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41043.

The product of its digits is 108, while the sum is 19.

Adding to 31113122113 its reverse (31122131113), we get a palindrome (62235253226).

The spelling of 31113122113 in words is "thirty-one billion, one hundred thirteen million, one hundred twenty-two thousand, one hundred thirteen".