31113021103312 has 20 divisors (see below), whose sum is σ = 60292130883040. Its totient is φ = 15553761520608.

The previous prime is 31113021103279. The next prime is 31113021103313. The reversal of 31113021103312 is 21330112031113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31113021103313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171721068 + ... + 171902155.

It is an arithmetic number, because the mean of its divisors is an integer number (3014606544152).

Almost surely, 2^{31113021103312} is an apocalyptic number.

It is an amenable number.

31113021103312 is a deficient number, since it is larger than the sum of its proper divisors (29179109779728).

31113021103312 is a wasteful number, since it uses less digits than its factorization.

31113021103312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343628890 (or 343628884 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 31113021103312 its reverse (21330112031113), we get a palindrome (52443133134425).

The spelling of 31113021103312 in words is "thirty-one trillion, one hundred thirteen billion, twenty-one million, one hundred three thousand, three hundred twelve".