10211100121 has 2 divisors, whose sum is σ = 10211100122. Its totient is φ = 10211100120.

The previous prime is 10211100113. The next prime is 10211100127. The reversal of 10211100121 is 12100111201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7521225625 + 2689874496 = 86725^2 + 51864^2 .

It is a cyclic number.

It is not a de Polignac number, because 10211100121 - 2³ = 10211100113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10211100098 and 10211100107.

It is not a weakly prime, because it can be changed into another prime (10211100127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5105550060 + 5105550061.

It is an arithmetic number, because the mean of its divisors is an integer number (5105550061).

Almost surely, 2^10211100121 is an apocalyptic number.

It is an amenable number.

10211100121 is a deficient number, since it is larger than the sum of its proper divisors (1).

10211100121 is an equidigital number, since it uses as much as digits as its factorization.

10211100121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 10211100121 its reverse (12100111201), we get a palindrome (22311211322).

The spelling of 10211100121 in words is "ten billion, two hundred eleven million, one hundred thousand, one hundred twenty-one".