142431215144221 has 2 divisors, whose sum is σ = 142431215144222. Its totient is φ = 142431215144220.

The previous prime is 142431215144083. The next prime is 142431215144269. The reversal of 142431215144221 is 122441512134241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87990590908900 + 54440624235321 = 9380330^2 + 7378389^2 .

It is an emirp because it is prime and its reverse (122441512134241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142431215144221 - 2²⁹ = 142430678273309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142431215144921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71215607572110 + 71215607572111.

It is an arithmetic number, because the mean of its divisors is an integer number (71215607572111).

Almost surely, 2^{142431215144221} is an apocalyptic number.

It is an amenable number.

142431215144221 is a deficient number, since it is larger than the sum of its proper divisors (1).

142431215144221 is an equidigital number, since it uses as much as digits as its factorization.

142431215144221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61440, while the sum is 37.

Adding to 142431215144221 its reverse (122441512134241), we get a palindrome (264872727278462).

The spelling of 142431215144221 in words is "one hundred forty-two trillion, four hundred thirty-one billion, two hundred fifteen million, one hundred forty-four thousand, two hundred twenty-one".