210212211997 has 2 divisors, whose sum is σ = 210212211998. Its totient is φ = 210212211996.

The previous prime is 210212211977. The next prime is 210212212033. The reversal of 210212211997 is 799112212012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 194780112921 + 15432099076 = 441339^2 + 124226^2 .

It is a cyclic number.

It is not a de Polignac number, because 210212211997 - 2¹⁹ = 210211687709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210212211907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105106105998 + 105106105999.

It is an arithmetic number, because the mean of its divisors is an integer number (105106105999).

Almost surely, 2^210212211997 is an apocalyptic number.

It is an amenable number.

210212211997 is a deficient number, since it is larger than the sum of its proper divisors (1).

210212211997 is an equidigital number, since it uses as much as digits as its factorization.

210212211997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 37.

The spelling of 210212211997 in words is "two hundred ten billion, two hundred twelve million, two hundred eleven thousand, nine hundred ninety-seven".