31103201120320 has 224 divisors, whose sum is σ = 89270575027200. Its totient is φ = 10083369867264.

The previous prime is 31103201120297. The next prime is 31103201120423. The reversal of 31103201120320 is 2302110230113.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (19).

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, 21560211 + ... + 22957549.

It is an arithmetic number, because the mean of its divisors is an integer number (398529352800).

Almost surely, 2^{31103201120320} 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 31103201120320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44635287513600).

31103201120320 is an abundant number, since it is smaller than the sum of its proper divisors (58167373906880).

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

31103201120320 is a wasteful number, since it uses less digits than its factorization.

31103201120320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397905 (or 1397895 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31103201120320 its reverse (2302110230113), we get a palindrome (33405311350433).

The spelling of 31103201120320 in words is "thirty-one trillion, one hundred three billion, two hundred one million, one hundred twenty thousand, three hundred twenty".