131211434343243 has 4 divisors (see below), whose sum is σ = 174948579124328. Its totient is φ = 87474289562160.

The previous prime is 131211434343163. The next prime is 131211434343259. The reversal of 131211434343243 is 342343434112131.

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

It is not a de Polignac number, because 131211434343243 - 2¹⁷ = 131211434212171 is a prime.

It is a super-2 number, since 2×131211434343243² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131211434342243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21868572390538 + ... + 21868572390543.

It is an arithmetic number, because the mean of its divisors is an integer number (43737144781082).

Almost surely, 2^{131211434343243} is an apocalyptic number.

131211434343243 is a deficient number, since it is larger than the sum of its proper divisors (43737144781085).

131211434343243 is an equidigital number, since it uses as much as digits as its factorization.

131211434343243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43737144781084.

The product of its digits is 248832, while the sum is 39.

Adding to 131211434343243 its reverse (342343434112131), we get a palindrome (473554868455374).

The spelling of 131211434343243 in words is "one hundred thirty-one trillion, two hundred eleven billion, four hundred thirty-four million, three hundred forty-three thousand, two hundred forty-three".