10211890121 has 2 divisors, whose sum is σ = 10211890122. Its totient is φ = 10211890120.

The previous prime is 10211890103. The next prime is 10211890151. The reversal of 10211890121 is 12109811201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9209281225 + 1002608896 = 95965^2 + 31664^2 .

It is a cyclic number.

It is not a de Polignac number, because 10211890121 - 2⁶ = 10211890057 is a prime.

It is not a weakly prime, because it can be changed into another prime (10211890151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5105945060 + 5105945061.

It is an arithmetic number, because the mean of its divisors is an integer number (5105945061).

Almost surely, 2^10211890121 is an apocalyptic number.

It is an amenable number.

10211890121 is a deficient number, since it is larger than the sum of its proper divisors (1).

10211890121 is an equidigital number, since it uses as much as digits as its factorization.

10211890121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 26.

The spelling of 10211890121 in words is "ten billion, two hundred eleven million, eight hundred ninety thousand, one hundred twenty-one".