31031103012 has 192 divisors, whose sum is σ = 94042368000. Its totient is φ = 7733698560.

The previous prime is 31031103007. The next prime is 31031103043. The reversal of 31031103012 is 21030113013.

It is a junction number, because it is equal to n+sod(n) for n = 31031102982 and 31031103000.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9314187 + ... + 9317517.

It is an arithmetic number, because the mean of its divisors is an integer number (489804000).

Almost surely, 2^31031103012 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 31031103012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47021184000).

31031103012 is an abundant number, since it is smaller than the sum of its proper divisors (63011264988).

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

31031103012 is a wasteful number, since it uses less digits than its factorization.

31031103012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3826 (or 3824 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 31031103012 its reverse (21030113013), we get a palindrome (52061216025).

The spelling of 31031103012 in words is "thirty-one billion, thirty-one million, one hundred three thousand, twelve".