2131112321320 has 64 divisors (see below), whose sum is σ = 4890409136640. Its totient is φ = 835516281600.

The previous prime is 2131112321311. The next prime is 2131112321323. The reversal of 2131112321320 is 231232111312.

It is a junction number, because it is equal to n+sod(n) for n = 2131112321291 and 2131112321300.

It is not an unprimeable number, because it can be changed into a prime (2131112321323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1593735 + ... + 2608105.

It is an arithmetic number, because the mean of its divisors is an integer number (76412642760).

Almost surely, 2^{2131112321320} is an apocalyptic number.

2131112321320 is a gapful number since it is divisible by the number (20) 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 2131112321320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2445204568320).

2131112321320 is an abundant number, since it is smaller than the sum of its proper divisors (2759296815320).

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

2131112321320 is a wasteful number, since it uses less digits than its factorization.

2131112321320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1015426 (or 1015422 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 2131112321320 its reverse (231232111312), we get a palindrome (2362344432632).

The spelling of 2131112321320 in words is "two trillion, one hundred thirty-one billion, one hundred twelve million, three hundred twenty-one thousand, three hundred twenty".