31112111005 has 16 divisors (see below), whose sum is σ = 38365023744. Its totient is φ = 24203448000.

The previous prime is 31112110987. The next prime is 31112111011. The reversal of 31112111005 is 50011121113.

It is a happy number.

It is not a de Polignac number, because 31112111005 - 2¹¹ = 31112108957 is a prime.

It is a super-2 number, since 2×31112111005² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31112111005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 291130 + ... + 383380.

It is an arithmetic number, because the mean of its divisors is an integer number (2397813984).

Almost surely, 2^31112111005 is an apocalyptic number.

It is an amenable number.

31112111005 is a deficient number, since it is larger than the sum of its proper divisors (7252912739).

31112111005 is a wasteful number, since it uses less digits than its factorization.

31112111005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94116.

The product of its (nonzero) digits is 30, while the sum is 16.

Adding to 31112111005 its reverse (50011121113), we get a palindrome (81123232118).

It can be divided in two parts, 3111 and 2111005, that added together give a square (2114116 = 1454²).

The spelling of 31112111005 in words is "thirty-one billion, one hundred twelve million, one hundred eleven thousand, five".