31231311333112 has 32 divisors (see below), whose sum is σ = 63882444804480. Its totient is φ = 14196002366560.

The previous prime is 31231311333067. The next prime is 31231311333149. The reversal of 31231311333112 is 21133311313213.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44507493 + ... + 45203755.

It is an arithmetic number, because the mean of its divisors is an integer number (1996326400140).

Almost surely, 2^{31231311333112} is an apocalyptic number.

It is an amenable number.

31231311333112 is an abundant number, since it is smaller than the sum of its proper divisors (32651133471368).

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

31231311333112 is a wasteful number, since it uses less digits than its factorization.

31231311333112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1206003 (or 1205999 counting only the distinct ones).

The product of its digits is 2916, while the sum is 28.

Adding to 31231311333112 its reverse (21133311313213), we get a palindrome (52364622646325).

The spelling of 31231311333112 in words is "thirty-one trillion, two hundred thirty-one billion, three hundred eleven million, three hundred thirty-three thousand, one hundred twelve".