131211443103421 has 2 divisors, whose sum is σ = 131211443103422. Its totient is φ = 131211443103420.

The previous prime is 131211443103413. The next prime is 131211443103473. The reversal of 131211443103421 is 124301344112131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130952799658521 + 258643444900 = 11443461^2 + 508570^2 .

It is a cyclic number.

It is not a de Polignac number, because 131211443103421 - 2³ = 131211443103413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131211443109421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65605721551710 + 65605721551711.

It is an arithmetic number, because the mean of its divisors is an integer number (65605721551711).

Almost surely, 2^{131211443103421} is an apocalyptic number.

It is an amenable number.

131211443103421 is a deficient number, since it is larger than the sum of its proper divisors (1).

131211443103421 is an equidigital number, since it uses as much as digits as its factorization.

131211443103421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 31.

Adding to 131211443103421 its reverse (124301344112131), we get a palindrome (255512787215552).

The spelling of 131211443103421 in words is "one hundred thirty-one trillion, two hundred eleven billion, four hundred forty-three million, one hundred three thousand, four hundred twenty-one".