2021010202121 has 2 divisors, whose sum is σ = 2021010202122. Its totient is φ = 2021010202120.

The previous prime is 2021010202087. The next prime is 2021010202151. The reversal of 2021010202121 is 1212020101202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1919787598096 + 101222604025 = 1385564^2 + 318155^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021010202121 - 2¹⁴ = 2021010185737 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2021010202096 and 2021010202105.

It is not a weakly prime, because it can be changed into another prime (2021010202151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010505101060 + 1010505101061.

It is an arithmetic number, because the mean of its divisors is an integer number (1010505101061).

Almost surely, 2^{2021010202121} is an apocalyptic number.

It is an amenable number.

2021010202121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021010202121 is an equidigital number, since it uses as much as digits as its factorization.

2021010202121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2021010202121 its reverse (1212020101202), we get a palindrome (3233030303323).

The spelling of 2021010202121 in words is "two trillion, twenty-one billion, ten million, two hundred two thousand, one hundred twenty-one".