131021223221443 has 4 divisors (see below), whose sum is σ = 131023191430648. Its totient is φ = 131019255012240.

The previous prime is 131021223221417. The next prime is 131021223221453. The reversal of 131021223221443 is 344122322120131.

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

It is a cyclic number.

It is not a de Polignac number, because 131021223221443 - 2²⁹ = 131020686350531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131021223221453) 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, 984004746 + ... + 984137887.

It is an arithmetic number, because the mean of its divisors is an integer number (32755797857662).

Almost surely, 2^{131021223221443} is an apocalyptic number.

131021223221443 is a deficient number, since it is larger than the sum of its proper divisors (1968209205).

131021223221443 is an equidigital number, since it uses as much as digits as its factorization.

131021223221443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1968209204.

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 131021223221443 its reverse (344122322120131), we get a palindrome (475143545341574).

The spelling of 131021223221443 in words is "one hundred thirty-one trillion, twenty-one billion, two hundred twenty-three million, two hundred twenty-one thousand, four hundred forty-three".