8121808102 has 4 divisors (see below), whose sum is σ = 12182712156. Its totient is φ = 4060904050.

The previous prime is 8121808091. The next prime is 8121808117. The reversal of 8121808102 is 2018081218.

It is a happy number.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2030452024 + ... + 2030452027.

It is an arithmetic number, because the mean of its divisors is an integer number (3045678039).

Almost surely, 2^8121808102 is an apocalyptic number.

8121808102 is a deficient number, since it is larger than the sum of its proper divisors (4060904054).

8121808102 is a wasteful number, since it uses less digits than its factorization.

8121808102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4060904053.

The product of its (nonzero) digits is 2048, while the sum is 31.

The square root of 8121808102 is about 90121.0746828953. The cubic root of 8121808102 is about 2010.0995884751.

The spelling of 8121808102 in words is "eight billion, one hundred twenty-one million, eight hundred eight thousand, one hundred two".