210012022021 has 2 divisors, whose sum is σ = 210012022022. Its totient is φ = 210012022020.

The previous prime is 210012022009. The next prime is 210012022093. The reversal of 210012022021 is 120220210012.

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., 205304141025 + 4707880996 = 453105^2 + 68614^2 .

It is a cyclic number.

It is not a de Polignac number, because 210012022021 - 2³⁷ = 72573068549 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210012021992 and 210012022010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210012022421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105006011010 + 105006011011.

It is an arithmetic number, because the mean of its divisors is an integer number (105006011011).

Almost surely, 2^210012022021 is an apocalyptic number.

It is an amenable number.

210012022021 is a deficient number, since it is larger than the sum of its proper divisors (1).

210012022021 is an equidigital number, since it uses as much as digits as its factorization.

210012022021 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 13.

Adding to 210012022021 its reverse (120220210012), we get a palindrome (330232232033).

The spelling of 210012022021 in words is "two hundred ten billion, twelve million, twenty-two thousand, twenty-one".