210010123121 has 2 divisors, whose sum is σ = 210010123122. Its totient is φ = 210010123120.

The previous prime is 210010123061. The next prime is 210010123123. The reversal of 210010123121 is 121321010012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 173752250896 + 36257872225 = 416836^2 + 190415^2 .

It is a cyclic number.

It is not a de Polignac number, because 210010123121 - 2¹⁰ = 210010122097 is a prime.

Together with 210010123123, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 210010123096 and 210010123105.

It is not a weakly prime, because it can be changed into another prime (210010123123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105005061560 + 105005061561.

It is an arithmetic number, because the mean of its divisors is an integer number (105005061561).

Almost surely, 2^210010123121 is an apocalyptic number.

It is an amenable number.

210010123121 is a deficient number, since it is larger than the sum of its proper divisors (1).

210010123121 is an equidigital number, since it uses as much as digits as its factorization.

210010123121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 210010123121 its reverse (121321010012), we get a palindrome (331331133133).

The spelling of 210010123121 in words is "two hundred ten billion, ten million, one hundred twenty-three thousand, one hundred twenty-one".