7851150121 has 2 divisors, whose sum is σ = 7851150122. Its totient is φ = 7851150120.

The previous prime is 7851150091. The next prime is 7851150127. The reversal of 7851150121 is 1210511587.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7063562025 + 787588096 = 84045^2 + 28064^2 .

It is a cyclic number.

It is not a de Polignac number, because 7851150121 - 2⁵ = 7851150089 is a prime.

It is not a weakly prime, because it can be changed into another prime (7851150127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3925575060 + 3925575061.

It is an arithmetic number, because the mean of its divisors is an integer number (3925575061).

Almost surely, 2^7851150121 is an apocalyptic number.

It is an amenable number.

7851150121 is a deficient number, since it is larger than the sum of its proper divisors (1).

7851150121 is an equidigital number, since it uses as much as digits as its factorization.

7851150121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2800, while the sum is 31.

The square root of 7851150121 is about 88606.7160039238. The cubic root of 7851150121 is about 1987.5181066399.

The spelling of 7851150121 in words is "seven billion, eight hundred fifty-one million, one hundred fifty thousand, one hundred twenty-one".