210211009997 has 2 divisors, whose sum is σ = 210211009998. Its totient is φ = 210211009996.

The previous prime is 210211009949. The next prime is 210211010033. The reversal of 210211009997 is 799900112012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125125620361 + 85085389636 = 353731^2 + 291694^2 .

It is a cyclic number.

It is not a de Polignac number, because 210211009997 - 2⁶ = 210211009933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210211009937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105105504998 + 105105504999.

It is an arithmetic number, because the mean of its divisors is an integer number (105105504999).

Almost surely, 2^210211009997 is an apocalyptic number.

It is an amenable number.

210211009997 is a deficient number, since it is larger than the sum of its proper divisors (1).

210211009997 is an equidigital number, since it uses as much as digits as its factorization.

210211009997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 41.

The spelling of 210211009997 in words is "two hundred ten billion, two hundred eleven million, nine thousand, nine hundred ninety-seven".