31112201105 has 4 divisors (see below), whose sum is σ = 37334641332. Its totient is φ = 24889760880.

The previous prime is 31112201101. The next prime is 31112201119. The reversal of 31112201105 is 50110221113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50110221113 = 719 ⋅69694327.

It can be written as a sum of positive squares in 2 ways, for example, as 8742811009 + 22369390096 = 93503^2 + 149564^2 .

It is not a de Polignac number, because 31112201105 - 2² = 31112201101 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31112201101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3111220106 + ... + 3111220115.

It is an arithmetic number, because the mean of its divisors is an integer number (9333660333).

Almost surely, 2^31112201105 is an apocalyptic number.

It is an amenable number.

31112201105 is a deficient number, since it is larger than the sum of its proper divisors (6222440227).

31112201105 is an equidigital number, since it uses as much as digits as its factorization.

31112201105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6222440226.

The product of its (nonzero) digits is 60, while the sum is 17.

Adding to 31112201105 its reverse (50110221113), we get a palindrome (81222422218).

The spelling of 31112201105 in words is "thirty-one billion, one hundred twelve million, two hundred one thousand, one hundred five".