421312206163 has 4 divisors (see below), whose sum is σ = 421519853440. Its totient is φ = 421104558888.

The previous prime is 421312206149. The next prime is 421312206181. The reversal of 421312206163 is 361602213124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 421312206163 - 2⁹ = 421312205651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421312209163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103820595 + ... + 103824652.

It is an arithmetic number, because the mean of its divisors is an integer number (105379963360).

Almost surely, 2^421312206163 is an apocalyptic number.

421312206163 is a deficient number, since it is larger than the sum of its proper divisors (207647277).

421312206163 is a wasteful number, since it uses less digits than its factorization.

421312206163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207647276.

The product of its (nonzero) digits is 10368, while the sum is 31.

Adding to 421312206163 its reverse (361602213124), we get a palindrome (782914419287).

The spelling of 421312206163 in words is "four hundred twenty-one billion, three hundred twelve million, two hundred six thousand, one hundred sixty-three".