131142343411221 has 4 divisors (see below), whose sum is σ = 174856457881632. Its totient is φ = 87428228940812.

The previous prime is 131142343411181. The next prime is 131142343411249. The reversal of 131142343411221 is 122114343241131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131142343411221 - 2²⁶ = 131142276302357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131142343411621) 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, 21857057235201 + ... + 21857057235206.

It is an arithmetic number, because the mean of its divisors is an integer number (43714114470408).

Almost surely, 2^{131142343411221} is an apocalyptic number.

It is an amenable number.

131142343411221 is a deficient number, since it is larger than the sum of its proper divisors (43714114470411).

131142343411221 is an equidigital number, since it uses as much as digits as its factorization.

131142343411221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43714114470410.

The product of its digits is 13824, while the sum is 33.

Adding to 131142343411221 its reverse (122114343241131), we get a palindrome (253256686652352).

The spelling of 131142343411221 in words is "one hundred thirty-one trillion, one hundred forty-two billion, three hundred forty-three million, four hundred eleven thousand, two hundred twenty-one".