421204334243 has 16 divisors (see below), whose sum is σ = 530337265920. Its totient is φ = 324961548000.

The previous prime is 421204334233. The next prime is 421204334263. The reversal of 421204334243 is 342433402124.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421204334243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421204334233) 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 in 15 ways as a sum of consecutive naturals, for example, 27072353 + ... + 27087906.

It is an arithmetic number, because the mean of its divisors is an integer number (33146079120).

Almost surely, 2^421204334243 is an apocalyptic number.

421204334243 is a deficient number, since it is larger than the sum of its proper divisors (109132931677).

421204334243 is a wasteful number, since it uses less digits than its factorization.

421204334243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54160378.

The product of its (nonzero) digits is 55296, while the sum is 32.

Adding to 421204334243 its reverse (342433402124), we get a palindrome (763637736367).

The spelling of 421204334243 in words is "four hundred twenty-one billion, two hundred four million, three hundred thirty-four thousand, two hundred forty-three".