131332663421 has 2 divisors, whose sum is σ = 131332663422. Its totient is φ = 131332663420.

The previous prime is 131332663411. The next prime is 131332663439. The reversal of 131332663421 is 124366233131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79933425625 + 51399237796 = 282725^2 + 226714^2 .

It is a cyclic number.

It is not a de Polignac number, because 131332663421 - 2²² = 131328469117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131332663411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65666331710 + 65666331711.

It is an arithmetic number, because the mean of its divisors is an integer number (65666331711).

Almost surely, 2^131332663421 is an apocalyptic number.

It is an amenable number.

131332663421 is a deficient number, since it is larger than the sum of its proper divisors (1).

131332663421 is an equidigital number, since it uses as much as digits as its factorization.

131332663421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 35.

Adding to 131332663421 its reverse (124366233131), we get a palindrome (255698896552).

The spelling of 131332663421 in words is "one hundred thirty-one billion, three hundred thirty-two million, six hundred sixty-three thousand, four hundred twenty-one".