210200012021 has 2 divisors, whose sum is σ = 210200012022. Its totient is φ = 210200012020.

The previous prime is 210200011981. The next prime is 210200012129. The reversal of 210200012021 is 120210002012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 183835995121 + 26364016900 = 428761^2 + 162370^2 .

It is a cyclic number.

It is not a de Polignac number, because 210200012021 - 2¹⁰ = 210200010997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210200011993 and 210200012011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210200012521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105100006010 + 105100006011.

It is an arithmetic number, because the mean of its divisors is an integer number (105100006011).

Almost surely, 2^210200012021 is an apocalyptic number.

It is an amenable number.

210200012021 is a deficient number, since it is larger than the sum of its proper divisors (1).

210200012021 is an equidigital number, since it uses as much as digits as its factorization.

210200012021 is an evil number, because the sum of its binary digits is even.

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

Adding to 210200012021 its reverse (120210002012), we get a palindrome (330410014033).

The spelling of 210200012021 in words is "two hundred ten billion, two hundred million, twelve thousand, twenty-one".