421016131 has 2 divisors, whose sum is σ = 421016132. Its totient is φ = 421016130.

The previous prime is 421016129. The next prime is 421016147. The reversal of 421016131 is 131610124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421016131 - 2¹ = 421016129 is a prime.

It is a super-3 number, since 3×421016131³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 421016129, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 421016099 and 421016108.

It is not a weakly prime, because it can be changed into another prime (421016831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210508065 + 210508066.

It is an arithmetic number, because the mean of its divisors is an integer number (210508066).

Almost surely, 2^421016131 is an apocalyptic number.

421016131 is a deficient number, since it is larger than the sum of its proper divisors (1).

421016131 is an equidigital number, since it uses as much as digits as its factorization.

421016131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 421016131 is about 20518.6776133356. The cubic root of 421016131 is about 749.4906948152.

Adding to 421016131 its reverse (131610124), we get a palindrome (552626255).

The spelling of 421016131 in words is "four hundred twenty-one million, sixteen thousand, one hundred thirty-one".