1020210010121 has 2 divisors, whose sum is σ = 1020210010122. Its totient is φ = 1020210010120.

The previous prime is 1020210010093. The next prime is 1020210010123. The reversal of 1020210010121 is 1210100120201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 595544041225 + 424665968896 = 771715^2 + 651664^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020210010121 - 2³⁸ = 745332103177 is a prime.

Together with 1020210010123, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1020210010123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510105005060 + 510105005061.

It is an arithmetic number, because the mean of its divisors is an integer number (510105005061).

Almost surely, 2^{1020210010121} is an apocalyptic number.

It is an amenable number.

1020210010121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020210010121 is an equidigital number, since it uses as much as digits as its factorization.

1020210010121 is an evil number, because the sum of its binary digits is even.

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

Adding to 1020210010121 its reverse (1210100120201), we get a palindrome (2230310130322).

The spelling of 1020210010121 in words is "one trillion, twenty billion, two hundred ten million, ten thousand, one hundred twenty-one".