212212220197 has 2 divisors, whose sum is σ = 212212220198. Its totient is φ = 212212220196.

The previous prime is 212212220189. The next prime is 212212220249. The reversal of 212212220197 is 791022212212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152936527041 + 59275693156 = 391071^2 + 243466^2 .

It is a cyclic number.

It is not a de Polignac number, because 212212220197 - 2³ = 212212220189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212212220117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106106110098 + 106106110099.

It is an arithmetic number, because the mean of its divisors is an integer number (106106110099).

Almost surely, 2^212212220197 is an apocalyptic number.

It is an amenable number.

212212220197 is a deficient number, since it is larger than the sum of its proper divisors (1).

212212220197 is an equidigital number, since it uses as much as digits as its factorization.

212212220197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 31.

The spelling of 212212220197 in words is "two hundred twelve billion, two hundred twelve million, two hundred twenty thousand, one hundred ninety-seven".