212103240197 has 2 divisors, whose sum is σ = 212103240198. Its totient is φ = 212103240196.

The previous prime is 212103240191. The next prime is 212103240221. The reversal of 212103240197 is 791042301212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187466484676 + 24636755521 = 432974^2 + 156961^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212103240197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212103240191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106051620098 + 106051620099.

It is an arithmetic number, because the mean of its divisors is an integer number (106051620099).

Almost surely, 2^212103240197 is an apocalyptic number.

It is an amenable number.

212103240197 is a deficient number, since it is larger than the sum of its proper divisors (1).

212103240197 is an equidigital number, since it uses as much as digits as its factorization.

212103240197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 32.

The spelling of 212103240197 in words is "two hundred twelve billion, one hundred three million, two hundred forty thousand, one hundred ninety-seven".