31112221113 has 12 divisors (see below), whose sum is σ = 45293733888. Its totient is φ = 20578161240.

The previous prime is 31112221111. The next prime is 31112221121.

31112221113 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 31112221113 - 2¹ = 31112221111 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31112221111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13608753 + ... + 13611038.

It is an arithmetic number, because the mean of its divisors is an integer number (3774477824).

Almost surely, 2^31112221113 is an apocalyptic number.

It is an amenable number.

31112221113 is a deficient number, since it is larger than the sum of its proper divisors (14181512775).

31112221113 is a wasteful number, since it uses less digits than its factorization.

31112221113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27219924 (or 27219921 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

The spelling of 31112221113 in words is "thirty-one billion, one hundred twelve million, two hundred twenty-one thousand, one hundred thirteen".