8442106121 has 2 divisors, whose sum is σ = 8442106122. Its totient is φ = 8442106120.

The previous prime is 8442106117. The next prime is 8442106129. The reversal of 8442106121 is 1216012448.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5899929721 + 2542176400 = 76811^2 + 50420^2 .

It is a cyclic number.

It is not a de Polignac number, because 8442106121 - 2² = 8442106117 is a prime.

It is not a weakly prime, because it can be changed into another prime (8442106129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4221053060 + 4221053061.

It is an arithmetic number, because the mean of its divisors is an integer number (4221053061).

Almost surely, 2^8442106121 is an apocalyptic number.

It is an amenable number.

8442106121 is a deficient number, since it is larger than the sum of its proper divisors (1).

8442106121 is an equidigital number, since it uses as much as digits as its factorization.

8442106121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 8442106121 is about 91880.9344804459. The cubic root of 8442106121 is about 2036.1836024170.

Adding to 8442106121 its reverse (1216012448), we get a palindrome (9658118569).

The spelling of 8442106121 in words is "eight billion, four hundred forty-two million, one hundred six thousand, one hundred twenty-one".