421122431 has 2 divisors, whose sum is σ = 421122432. Its totient is φ = 421122430.

The previous prime is 421122421. The next prime is 421122497. The reversal of 421122431 is 134221124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421122431 - 2⁶ = 421122367 is a prime.

It is a super-2 number, since 2×421122431² = 354688203782699522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421122421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210561215 + 210561216.

It is an arithmetic number, because the mean of its divisors is an integer number (210561216).

Almost surely, 2^421122431 is an apocalyptic number.

421122431 is a deficient number, since it is larger than the sum of its proper divisors (1).

421122431 is an equidigital number, since it uses as much as digits as its factorization.

421122431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 20.

The square root of 421122431 is about 20521.2677727279. The cubic root of 421122431 is about 749.5537677402.

Adding to 421122431 its reverse (134221124), we get a palindrome (555343555).

The spelling of 421122431 in words is "four hundred twenty-one million, one hundred twenty-two thousand, four hundred thirty-one".