2131343321340 has 48 divisors (see below), whose sum is σ = 5968442551680. Its totient is φ = 568293337920.

The previous prime is 2131343321297. The next prime is 2131343321369. The reversal of 2131343321340 is 431233431312.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 2131343321298 and 2131343321307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1496406 + ... + 2549885.

It is an arithmetic number, because the mean of its divisors is an integer number (124342553160).

Almost surely, 2^{2131343321340} is an apocalyptic number.

2131343321340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2131343321340 is an abundant number, since it is smaller than the sum of its proper divisors (3837099230340).

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

2131343321340 is a wasteful number, since it uses less digits than its factorization.

2131343321340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4055082 (or 4055080 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 30.

Adding to 2131343321340 its reverse (431233431312), we get a palindrome (2562576752652).

The spelling of 2131343321340 in words is "two trillion, one hundred thirty-one billion, three hundred forty-three million, three hundred twenty-one thousand, three hundred forty".