31031101112 has 32 divisors (see below), whose sum is σ = 66813379200. Its totient is φ = 13362674400.

The previous prime is 31031101111. The next prime is 31031101237. The reversal of 31031101112 is 21110113013.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31031101111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9277964 + ... + 9281307.

It is an arithmetic number, because the mean of its divisors is an integer number (2087918100).

Almost surely, 2^31031101112 is an apocalyptic number.

It is an amenable number.

31031101112 is an abundant number, since it is smaller than the sum of its proper divisors (35782278088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31031101112 is a wasteful number, since it uses less digits than its factorization.

31031101112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18559307 (or 18559303 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 31031101112 its reverse (21110113013), we get a palindrome (52141214125).

The spelling of 31031101112 in words is "thirty-one billion, thirty-one million, one hundred one thousand, one hundred twelve".