31211031123104 has 96 divisors (see below), whose sum is σ = 72542955856896. Its totient is φ = 12935235317760.

The previous prime is 31211031123091. The next prime is 31211031123113. The reversal of 31211031123104 is 40132113011213.

It is a self number, because there is not a number n which added to its sum of digits gives 31211031123104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7897304 + ... + 11170920.

It is an arithmetic number, because the mean of its divisors is an integer number (755655790176).

Almost surely, 2^{31211031123104} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31211031123104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36271477928448).

31211031123104 is an abundant number, since it is smaller than the sum of its proper divisors (41331924733792).

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

31211031123104 is a wasteful number, since it uses less digits than its factorization.

31211031123104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3275038 (or 3275030 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 31211031123104 its reverse (40132113011213), we get a palindrome (71343144134317).

The spelling of 31211031123104 in words is "thirty-one trillion, two hundred eleven billion, thirty-one million, one hundred twenty-three thousand, one hundred four".