2131311213240 has 64 divisors (see below), whose sum is σ = 6975200338560. Its totient is φ = 516681505920.

The previous prime is 2131311213223. The next prime is 2131311213281. The reversal of 2131311213240 is 423121131312.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2131311213240.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 807313534 + ... + 807316173.

It is an arithmetic number, because the mean of its divisors is an integer number (108987505290).

Almost surely, 2^{2131311213240} is an apocalyptic number.

2131311213240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2131311213240 is an abundant number, since it is smaller than the sum of its proper divisors (4843889125320).

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

2131311213240 is a wasteful number, since it uses less digits than its factorization.

2131311213240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1614629732 (or 1614629728 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 2131311213240 its reverse (423121131312), we get a palindrome (2554432344552).

The spelling of 2131311213240 in words is "two trillion, one hundred thirty-one billion, three hundred eleven million, two hundred thirteen thousand, two hundred forty".