131221331403441 has 16 divisors (see below), whose sum is σ = 186389208848640. Its totient is φ = 81878116738320.

The previous prime is 131221331403377. The next prime is 131221331403529. The reversal of 131221331403441 is 144304133122131.

It is a happy number.

It is not a de Polignac number, because 131221331403441 - 2⁶ = 131221331403377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131221331403941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13868239975 + ... + 13868249436.

It is an arithmetic number, because the mean of its divisors is an integer number (11649325553040).

Almost surely, 2^{131221331403441} is an apocalyptic number.

It is an amenable number.

131221331403441 is a deficient number, since it is larger than the sum of its proper divisors (55167877445199).

131221331403441 is a wasteful number, since it uses less digits than its factorization.

131221331403441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27736489516.

The product of its (nonzero) digits is 20736, while the sum is 33.

Adding to 131221331403441 its reverse (144304133122131), we get a palindrome (275525464525572).

The spelling of 131221331403441 in words is "one hundred thirty-one trillion, two hundred twenty-one billion, three hundred thirty-one million, four hundred three thousand, four hundred forty-one".