212012197 has 2 divisors, whose sum is σ = 212012198. Its totient is φ = 212012196.

The previous prime is 212012123. The next prime is 212012209. The reversal of 212012197 is 791210212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 208918116 + 3094081 = 14454^2 + 1759^2 .

It is a cyclic number.

It is not a de Polignac number, because 212012197 - 2¹⁵ = 211979429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212012897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106006098 + 106006099.

It is an arithmetic number, because the mean of its divisors is an integer number (106006099).

Almost surely, 2^212012197 is an apocalyptic number.

It is an amenable number.

212012197 is a deficient number, since it is larger than the sum of its proper divisors (1).

212012197 is an equidigital number, since it uses as much as digits as its factorization.

212012197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 212012197 is about 14560.6386192365. The cubic root of 212012197 is about 596.2846306874.

The spelling of 212012197 in words is "two hundred twelve million, twelve thousand, one hundred ninety-seven".