131443343021 has 4 divisors (see below), whose sum is σ = 131444104032. Its totient is φ = 131442582012.

The previous prime is 131443342999. The next prime is 131443343023. The reversal of 131443343021 is 120343344131.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 131443343021 - 2⁶ = 131443342957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131443343023) 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, 17000 + ... + 513006.

It is an arithmetic number, because the mean of its divisors is an integer number (32861026008).

Almost surely, 2^131443343021 is an apocalyptic number.

It is an amenable number.

131443343021 is a deficient number, since it is larger than the sum of its proper divisors (761011).

131443343021 is an equidigital number, since it uses as much as digits as its factorization.

131443343021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761010.

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 131443343021 its reverse (120343344131), we get a palindrome (251786687152).

The spelling of 131443343021 in words is "one hundred thirty-one billion, four hundred forty-three million, three hundred forty-three thousand, twenty-one".