421112165410121 has 2 divisors, whose sum is σ = 421112165410122. Its totient is φ = 421112165410120.

The previous prime is 421112165410093. The next prime is 421112165410159. The reversal of 421112165410121 is 121014561211124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 364573962192400 + 56538203217721 = 19093820^2 + 7519189^2 .

It is a cyclic number.

It is not a de Polignac number, because 421112165410121 - 2¹⁴ = 421112165393737 is a prime.

It is a super-2 number, since 2×421112165410121² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (421112165410421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210556082705060 + 210556082705061.

It is an arithmetic number, because the mean of its divisors is an integer number (210556082705061).

Almost surely, 2^{421112165410121} is an apocalyptic number.

It is an amenable number.

421112165410121 is a deficient number, since it is larger than the sum of its proper divisors (1).

421112165410121 is an equidigital number, since it uses as much as digits as its factorization.

421112165410121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 32.

The spelling of 421112165410121 in words is "four hundred twenty-one trillion, one hundred twelve billion, one hundred sixty-five million, four hundred ten thousand, one hundred twenty-one".