142321011513521 has 2 divisors, whose sum is σ = 142321011513522. Its totient is φ = 142321011513520.

The previous prime is 142321011513511. The next prime is 142321011513539. The reversal of 142321011513521 is 125315110123241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129682808762896 + 12638202750625 = 11387836^2 + 3555025^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142321011513521 is a prime.

It is not a weakly prime, because it can be changed into another prime (142321011513511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71160505756760 + 71160505756761.

It is an arithmetic number, because the mean of its divisors is an integer number (71160505756761).

Almost surely, 2^{142321011513521} is an apocalyptic number.

It is an amenable number.

142321011513521 is a deficient number, since it is larger than the sum of its proper divisors (1).

142321011513521 is an equidigital number, since it uses as much as digits as its factorization.

142321011513521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 32.

Adding to 142321011513521 its reverse (125315110123241), we get a palindrome (267636121636762).

The spelling of 142321011513521 in words is "one hundred forty-two trillion, three hundred twenty-one billion, eleven million, five hundred thirteen thousand, five hundred twenty-one".