2331131313421 has 12 divisors (see below), whose sum is σ = 2462718582300. Its totient is φ = 2206251105408.

The previous prime is 2331131313361. The next prime is 2331131313431. The reversal of 2331131313421 is 1243131311332.

It can be written as a sum of positive squares in 2 ways, for example, as 475528851396 + 1855602462025 = 689586^2 + 1362205^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2331131313421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2331131313421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2331131313431) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2835666 + ... + 3564163.

It is an arithmetic number, because the mean of its divisors is an integer number (205226548525).

Almost surely, 2^{2331131313421} is an apocalyptic number.

It is an amenable number.

2331131313421 is a deficient number, since it is larger than the sum of its proper divisors (131587268879).

2331131313421 is a wasteful number, since it uses less digits than its factorization.

2331131313421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6400876 (or 6400857 counting only the distinct ones).

The product of its digits is 3888, while the sum is 28.

Adding to 2331131313421 its reverse (1243131311332), we get a palindrome (3574262624753).

The spelling of 2331131313421 in words is "two trillion, three hundred thirty-one billion, one hundred thirty-one million, three hundred thirteen thousand, four hundred twenty-one".