210000020012021 has 2 divisors, whose sum is σ = 210000020012022. Its totient is φ = 210000020012020.

The previous prime is 210000020012011. The next prime is 210000020012023. The reversal of 210000020012021 is 120210020000012.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193929855256900 + 16070164755121 = 13925870^2 + 4008761^2 .

It is a cyclic number.

It is not a de Polignac number, because 210000020012021 - 2³⁴ = 209982840142837 is a prime.

Together with 210000020012023, 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 = 210000020011993 and 210000020012011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210000020012023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105000010006010 + 105000010006011.

It is an arithmetic number, because the mean of its divisors is an integer number (105000010006011).

Almost surely, 2^{210000020012021} is an apocalyptic number.

It is an amenable number.

210000020012021 is a deficient number, since it is larger than the sum of its proper divisors (1).

210000020012021 is an equidigital number, since it uses as much as digits as its factorization.

210000020012021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 210000020012021 its reverse (120210020000012), we get a palindrome (330210040012033).

The spelling of 210000020012021 in words is "two hundred ten trillion, twenty million, twelve thousand, twenty-one".