31313201112 has 24 divisors (see below), whose sum is σ = 84806586540. Its totient is φ = 10437733680.

The previous prime is 31313201111. The next prime is 31313201113. The reversal of 31313201112 is 21110231313.

It is an interprime number because it is at equal distance from previous prime (31313201111) and next prime (31313201113).

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31313201111) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 217452714 + ... + 217452857.

Almost surely, 2^31313201112 is an apocalyptic number.

It is an amenable number.

31313201112 is an abundant number, since it is smaller than the sum of its proper divisors (53493385428).

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

31313201112 is a wasteful number, since it uses less digits than its factorization.

31313201112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434905583 (or 434905576 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 31313201112 its reverse (21110231313), we get a palindrome (52423432425).

The spelling of 31313201112 in words is "thirty-one billion, three hundred thirteen million, two hundred one thousand, one hundred twelve".