210211219997 has 2 divisors, whose sum is σ = 210211219998. Its totient is φ = 210211219996.

The previous prime is 210211219991. The next prime is 210211220077. The reversal of 210211219997 is 799912112012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210120475321 + 90744676 = 458389^2 + 9526^2 .

It is a cyclic number.

It is not a de Polignac number, because 210211219997 - 2⁸ = 210211219741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210211219991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105105609998 + 105105609999.

It is an arithmetic number, because the mean of its divisors is an integer number (105105609999).

Almost surely, 2^210211219997 is an apocalyptic number.

It is an amenable number.

210211219997 is a deficient number, since it is larger than the sum of its proper divisors (1).

210211219997 is an equidigital number, since it uses as much as digits as its factorization.

210211219997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 44.

The spelling of 210211219997 in words is "two hundred ten billion, two hundred eleven million, two hundred nineteen thousand, nine hundred ninety-seven".