31012103133312 has 256 divisors, whose sum is σ = 98300415283200. Its totient is φ = 8469894647808.

The previous prime is 31012103133293. The next prime is 31012103133317. The reversal of 31012103133312 is 21333130121013.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (31012103133317) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96222738 + ... + 96544494.

It is an arithmetic number, because the mean of its divisors is an integer number (383985997200).

Almost surely, 2^{31012103133312} is an apocalyptic number.

31012103133312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31012103133312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49150207641600).

31012103133312 is an abundant number, since it is smaller than the sum of its proper divisors (67288312149888).

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

31012103133312 is a wasteful number, since it uses less digits than its factorization.

31012103133312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323363 (or 323351 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 24.

Adding to 31012103133312 its reverse (21333130121013), we get a palindrome (52345233254325).

The spelling of 31012103133312 in words is "thirty-one trillion, twelve billion, one hundred three million, one hundred thirty-three thousand, three hundred twelve".