421103443 has 2 divisors, whose sum is σ = 421103444. Its totient is φ = 421103442.

The previous prime is 421103399. The next prime is 421103471. The reversal of 421103443 is 344301124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421103443 - 2⁹ = 421102931 is a prime.

It is not a weakly prime, because it can be changed into another prime (421100443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210551721 + 210551722.

It is an arithmetic number, because the mean of its divisors is an integer number (210551722).

Almost surely, 2^421103443 is an apocalyptic number.

421103443 is a deficient number, since it is larger than the sum of its proper divisors (1).

421103443 is an equidigital number, since it uses as much as digits as its factorization.

421103443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 421103443 is about 20520.8051255305. The cubic root of 421103443 is about 749.5425020212.

Adding to 421103443 its reverse (344301124), we get a palindrome (765404567).

The spelling of 421103443 in words is "four hundred twenty-one million, one hundred three thousand, four hundred forty-three".