131321433142 has 4 divisors (see below), whose sum is σ = 196982149716. Its totient is φ = 65660716570.

The previous prime is 131321433127. The next prime is 131321433143. The reversal of 131321433142 is 241334123131.

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

It is a self number, because there is not a number n which added to its sum of digits gives 131321433142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131321433143) 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 as a sum of consecutive naturals, namely, 32830358284 + ... + 32830358287.

It is an arithmetic number, because the mean of its divisors is an integer number (49245537429).

Almost surely, 2^131321433142 is an apocalyptic number.

131321433142 is a deficient number, since it is larger than the sum of its proper divisors (65660716574).

131321433142 is an equidigital number, since it uses as much as digits as its factorization.

131321433142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65660716573.

The product of its digits is 5184, while the sum is 28.

Adding to 131321433142 its reverse (241334123131), we get a palindrome (372655556273).

The spelling of 131321433142 in words is "one hundred thirty-one billion, three hundred twenty-one million, four hundred thirty-three thousand, one hundred forty-two".