8120121 has 8 divisors (see below), whose sum is σ = 10847904. Its totient is φ = 5402880.

The previous prime is 8120117. The next prime is 8120129. The reversal of 8120121 is 1210218.

8120121 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8120121 - 2² = 8120117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8120121.

It is not an unprimeable number, because it can be changed into a prime (8120129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 615 + ... + 4076.

It is an arithmetic number, because the mean of its divisors is an integer number (1355988).

Almost surely, 2^8120121 is an apocalyptic number.

It is an amenable number.

8120121 is a deficient number, since it is larger than the sum of its proper divisors (2727783).

8120121 is a wasteful number, since it uses less digits than its factorization.

8120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5271.

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 8120121 is about 2849.5826010137. The cubic root of 8120121 is about 200.9960396240.

Adding to 8120121 its reverse (1210218), we get a palindrome (9330339).

Subtracting from 8120121 its reverse (1210218), we obtain a triangular number (6909903 = T₃₇₁₇).

It can be divided in two parts, 81 and 20121, that added together give a palindrome (20202).

The spelling of 8120121 in words is "eight million, one hundred twenty thousand, one hundred twenty-one".