31330103112 has 288 divisors, whose sum is σ = 107059680000. Its totient is φ = 8101969920.

The previous prime is 31330103099. The next prime is 31330103153. The reversal of 31330103112 is 21130103313.

It is a happy number.

31330103112 is a `hidden beast` number, since 313 + 30 + 10 + 311 + 2 = 666.

It is a super-2 number, since 2×31330103112² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 15671889 + ... + 15673887.

It is an arithmetic number, because the mean of its divisors is an integer number (371735000).

Almost surely, 2^31330103112 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 31330103112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53529840000).

31330103112 is an abundant number, since it is smaller than the sum of its proper divisors (75729576888).

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

31330103112 is a wasteful number, since it uses less digits than its factorization.

31330103112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2297 (or 2279 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 31330103112 its reverse (21130103313), we get a palindrome (52460206425).

The spelling of 31330103112 in words is "thirty-one billion, three hundred thirty million, one hundred three thousand, one hundred twelve".