131312312342421 has 48 divisors (see below), whose sum is σ = 204446884973760. Its totient is φ = 74748736742400.

The previous prime is 131312312342401. The next prime is 131312312342461. The reversal of 131312312342421 is 124243213213131.

It is not a de Polignac number, because 131312312342421 - 2⁷ = 131312312342293 is a prime.

It is a super-2 number, since 2×131312312342421² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131312312342401) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 383277246 + ... + 383619696.

It is an arithmetic number, because the mean of its divisors is an integer number (4259310103620).

Almost surely, 2^{131312312342421} is an apocalyptic number.

It is an amenable number.

131312312342421 is a deficient number, since it is larger than the sum of its proper divisors (73134572631339).

131312312342421 is a wasteful number, since it uses less digits than its factorization.

131312312342421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352434 (or 352427 counting only the distinct ones).

The product of its digits is 20736, while the sum is 33.

Adding to 131312312342421 its reverse (124243213213131), we get a palindrome (255555525555552).

The spelling of 131312312342421 in words is "one hundred thirty-one trillion, three hundred twelve billion, three hundred twelve million, three hundred forty-two thousand, four hundred twenty-one".