31243311320212 has 24 divisors (see below), whose sum is σ = 56146054680576. Its totient is φ = 15206223116448.

The previous prime is 31243311320201. The next prime is 31243311320233. The reversal of 31243311320212 is 21202311334213.

It is a super-2 number, since 2×31243311320212² (a number of 28 digits) contains 22 as substring.

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, 580186108 + ... + 580239955.

It is an arithmetic number, because the mean of its divisors is an integer number (2339418945024).

Almost surely, 2^{31243311320212} is an apocalyptic number.

It is an amenable number.

31243311320212 is a deficient number, since it is larger than the sum of its proper divisors (24902743360364).

31243311320212 is a wasteful number, since it uses less digits than its factorization.

31243311320212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1160426247 (or 1160426245 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 31243311320212 its reverse (21202311334213), we get a palindrome (52445622654425).

The spelling of 31243311320212 in words is "thirty-one trillion, two hundred forty-three billion, three hundred eleven million, three hundred twenty thousand, two hundred twelve".