8421912811 has 16 divisors (see below), whose sum is σ = 9551197600. Its totient is φ = 7361756928.

The previous prime is 8421912809. The next prime is 8421912833. The reversal of 8421912811 is 1182191248.

It is a cyclic number.

It is not a de Polignac number, because 8421912811 - 2¹ = 8421912809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8421912871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 714655 + ... + 726343.

It is an arithmetic number, because the mean of its divisors is an integer number (596949850).

Almost surely, 2^8421912811 is an apocalyptic number.

8421912811 is a deficient number, since it is larger than the sum of its proper divisors (1129284789).

8421912811 is a wasteful number, since it uses less digits than its factorization.

8421912811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14638.

The product of its digits is 9216, while the sum is 37.

The square root of 8421912811 is about 91770.9802225082. The cubic root of 8421912811 is about 2034.5588058875.

The spelling of 8421912811 in words is "eight billion, four hundred twenty-one million, nine hundred twelve thousand, eight hundred eleven".