421685196271 has 2 divisors, whose sum is σ = 421685196272. Its totient is φ = 421685196270.

The previous prime is 421685196263. The next prime is 421685196311. The reversal of 421685196271 is 172691586124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421685196271 - 2³ = 421685196263 is a prime.

It is a super-2 number, since 2×421685196271² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421685196671) 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, 210842598135 + 210842598136.

It is an arithmetic number, because the mean of its divisors is an integer number (210842598136).

Almost surely, 2^421685196271 is an apocalyptic number.

421685196271 is a deficient number, since it is larger than the sum of its proper divisors (1).

421685196271 is an equidigital number, since it uses as much as digits as its factorization.

421685196271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1451520, while the sum is 52.

The spelling of 421685196271 in words is "four hundred twenty-one billion, six hundred eighty-five million, one hundred ninety-six thousand, two hundred seventy-one".