8210650121 has 2 divisors, whose sum is σ = 8210650122. Its totient is φ = 8210650120.

The previous prime is 8210650079. The next prime is 8210650159. The reversal of 8210650121 is 1210560128.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8183192521 + 27457600 = 90461^2 + 5240^2 .

It is a cyclic number.

It is not a de Polignac number, because 8210650121 - 2³⁰ = 7136908297 is a prime.

It is not a weakly prime, because it can be changed into another prime (8210650171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4105325060 + 4105325061.

It is an arithmetic number, because the mean of its divisors is an integer number (4105325061).

Almost surely, 2^8210650121 is an apocalyptic number.

It is an amenable number.

8210650121 is a deficient number, since it is larger than the sum of its proper divisors (1).

8210650121 is an equidigital number, since it uses as much as digits as its factorization.

8210650121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 8210650121 is about 90612.6377554478. The cubic root of 8210650121 is about 2017.4023172498.

The spelling of 8210650121 in words is "eight billion, two hundred ten million, six hundred fifty thousand, one hundred twenty-one".