421044433423 has 2 divisors, whose sum is σ = 421044433424. Its totient is φ = 421044433422.

The previous prime is 421044433367. The next prime is 421044433457. The reversal of 421044433423 is 324334440124.

It is an a-pointer prime, because the next prime (421044433457) can be obtained adding 421044433423 to its sum of digits (34).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421044433423 - 2¹³ = 421044425231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421044433463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210522216711 + 210522216712.

It is an arithmetic number, because the mean of its divisors is an integer number (210522216712).

Almost surely, 2^421044433423 is an apocalyptic number.

421044433423 is a deficient number, since it is larger than the sum of its proper divisors (1).

421044433423 is an equidigital number, since it uses as much as digits as its factorization.

421044433423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 110592, while the sum is 34.

Adding to 421044433423 its reverse (324334440124), we get a palindrome (745378873547).

The spelling of 421044433423 in words is "four hundred twenty-one billion, forty-four million, four hundred thirty-three thousand, four hundred twenty-three".