212210100397 has 2 divisors, whose sum is σ = 212210100398. Its totient is φ = 212210100396.

The previous prime is 212210100313. The next prime is 212210100413. The reversal of 212210100397 is 793001012212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151952615721 + 60257484676 = 389811^2 + 245474^2 .

It is a cyclic number.

It is not a de Polignac number, because 212210100397 - 2¹⁹ = 212209576109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212210100197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106105050198 + 106105050199.

It is an arithmetic number, because the mean of its divisors is an integer number (106105050199).

Almost surely, 2^212210100397 is an apocalyptic number.

It is an amenable number.

212210100397 is a deficient number, since it is larger than the sum of its proper divisors (1).

212210100397 is an equidigital number, since it uses as much as digits as its factorization.

212210100397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 28.

The spelling of 212210100397 in words is "two hundred twelve billion, two hundred ten million, one hundred thousand, three hundred ninety-seven".