131021444402143 has 4 divisors (see below), whose sum is σ = 131106357847888. Its totient is φ = 130936530956400.

The previous prime is 131021444402117. The next prime is 131021444402159. The reversal of 131021444402143 is 341204444120131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131021444402143 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131021444402099 and 131021444402108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131021444402243) 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, 42456720558 + ... + 42456723643.

It is an arithmetic number, because the mean of its divisors is an integer number (32776589461972).

Almost surely, 2^{131021444402143} is an apocalyptic number.

131021444402143 is a deficient number, since it is larger than the sum of its proper divisors (84913445745).

131021444402143 is an equidigital number, since it uses as much as digits as its factorization.

131021444402143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84913445744.

The product of its (nonzero) digits is 36864, while the sum is 34.

Adding to 131021444402143 its reverse (341204444120131), we get a palindrome (472225888522274).

The spelling of 131021444402143 in words is "one hundred thirty-one trillion, twenty-one billion, four hundred forty-four million, four hundred two thousand, one hundred forty-three".