421202371 has 2 divisors, whose sum is σ = 421202372. Its totient is φ = 421202370.

The previous prime is 421202333. The next prime is 421202447. The reversal of 421202371 is 173202124.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421202371 is a prime.

It is a super-2 number, since 2×421202371² = 354822874672043282, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (421202321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210601185 + 210601186.

It is an arithmetic number, because the mean of its divisors is an integer number (210601186).

Almost surely, 2^421202371 is an apocalyptic number.

421202371 is a deficient number, since it is larger than the sum of its proper divisors (1).

421202371 is an equidigital number, since it uses as much as digits as its factorization.

421202371 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 421202371 is about 20523.2154157189. The cubic root of 421202371 is about 749.6011930119.

Adding to 421202371 its reverse (173202124), we get a palindrome (594404495).

The spelling of 421202371 in words is "four hundred twenty-one million, two hundred two thousand, three hundred seventy-one".