31103320310320 has 160 divisors (see below), whose sum is σ = 74558755434240. Its totient is φ = 12060478955520.

The previous prime is 31103320310317. The next prime is 31103320310353. The reversal of 31103320310320 is 2301302330113.

It is a junction number, because it is equal to n+sod(n) for n = 31103320310291 and 31103320310300.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1254507844 + ... + 1254532636.

It is an arithmetic number, because the mean of its divisors is an integer number (465992221464).

Almost surely, 2^{31103320310320} 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 31103320310320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37279377717120).

31103320310320 is an abundant number, since it is smaller than the sum of its proper divisors (43455435123920).

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

31103320310320 is a wasteful number, since it uses less digits than its factorization.

31103320310320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28023 (or 28017 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 31103320310320 its reverse (2301302330113), we get a palindrome (33404622640433).

The spelling of 31103320310320 in words is "thirty-one trillion, one hundred three billion, three hundred twenty million, three hundred ten thousand, three hundred twenty".