12421443562061 has 2 divisors, whose sum is σ = 12421443562062. Its totient is φ = 12421443562060.

The previous prime is 12421443561997. The next prime is 12421443562147. The reversal of 12421443562061 is 16026534412421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12239460268036 + 181983294025 = 3498494^2 + 426595^2 .

It is a cyclic number.

It is not a de Polignac number, because 12421443562061 - 2⁶ = 12421443561997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12421443562361) 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 as a sum of consecutive naturals, namely, 6210721781030 + 6210721781031.

It is an arithmetic number, because the mean of its divisors is an integer number (6210721781031).

Almost surely, 2^{12421443562061} is an apocalyptic number.

It is an amenable number.

12421443562061 is a deficient number, since it is larger than the sum of its proper divisors (1).

12421443562061 is an equidigital number, since it uses as much as digits as its factorization.

12421443562061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 276480, while the sum is 41.

Adding to 12421443562061 its reverse (16026534412421), we get a palindrome (28447977974482).

The spelling of 12421443562061 in words is "twelve trillion, four hundred twenty-one billion, four hundred forty-three million, five hundred sixty-two thousand, sixty-one".