421312043242081 has 2 divisors, whose sum is σ = 421312043242082. Its totient is φ = 421312043242080.

The previous prime is 421312043242037. The next prime is 421312043242183. The reversal of 421312043242081 is 180242340213124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 316949657486400 + 104362385755681 = 17803080^2 + 10215791^2 .

It is a cyclic number.

It is not a de Polignac number, because 421312043242081 - 2¹⁹ = 421312042717793 is a prime.

It is a super-2 number, since 2×421312043242081² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 421312043242081.

It is not a weakly prime, because it can be changed into another prime (421312043242031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210656021621040 + 210656021621041.

It is an arithmetic number, because the mean of its divisors is an integer number (210656021621041).

Almost surely, 2^{421312043242081} is an apocalyptic number.

It is an amenable number.

421312043242081 is a deficient number, since it is larger than the sum of its proper divisors (1).

421312043242081 is an equidigital number, since it uses as much as digits as its factorization.

421312043242081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 73728, while the sum is 37.

The spelling of 421312043242081 in words is "four hundred twenty-one trillion, three hundred twelve billion, forty-three million, two hundred forty-two thousand, eighty-one".