231310131421 has 4 divisors (see below), whose sum is σ = 233600330844. Its totient is φ = 229019932000.

The previous prime is 231310131397. The next prime is 231310131427. The reversal of 231310131421 is 124131013132.

231310131421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 194846319396 + 36463812025 = 441414^2 + 190955^2 .

It is a cyclic number.

It is not a de Polignac number, because 231310131421 - 2⁷ = 231310131293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231310131392 and 231310131401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231310131427) 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 3 ways as a sum of consecutive naturals, for example, 1145099560 + ... + 1145099761.

It is an arithmetic number, because the mean of its divisors is an integer number (58400082711).

Almost surely, 2^231310131421 is an apocalyptic number.

It is an amenable number.

231310131421 is a deficient number, since it is larger than the sum of its proper divisors (2290199423).

231310131421 is a wasteful number, since it uses less digits than its factorization.

231310131421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2290199422.

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

Adding to 231310131421 its reverse (124131013132), we get a palindrome (355441144553).

The spelling of 231310131421 in words is "two hundred thirty-one billion, three hundred ten million, one hundred thirty-one thousand, four hundred twenty-one".