10211002121 has 2 divisors, whose sum is σ = 10211002122. Its totient is φ = 10211002120.

The previous prime is 10211002091. The next prime is 10211002157. The reversal of 10211002121 is 12120011201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6412005625 + 3798996496 = 80075^2 + 61636^2 .

It is a cyclic number.

It is not a de Polignac number, because 10211002121 - 2²⁶ = 10143893257 is a prime.

It is not a weakly prime, because it can be changed into another prime (10211008121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5105501060 + 5105501061.

It is an arithmetic number, because the mean of its divisors is an integer number (5105501061).

Almost surely, 2^10211002121 is an apocalyptic number.

It is an amenable number.

10211002121 is a deficient number, since it is larger than the sum of its proper divisors (1).

10211002121 is an equidigital number, since it uses as much as digits as its factorization.

10211002121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 10211002121 its reverse (12120011201), we get a palindrome (22331013322).

The spelling of 10211002121 in words is "ten billion, two hundred eleven million, two thousand, one hundred twenty-one".