212221301213197 has 2 divisors, whose sum is σ = 212221301213198. Its totient is φ = 212221301213196.

The previous prime is 212221301213179. The next prime is 212221301213231. The reversal of 212221301213197 is 791312103122212.

Together with previous prime (212221301213179) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 210419945327881 + 1801355885316 = 14505859^2 + 1342146^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212221301213197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212221301213297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106110650606598 + 106110650606599.

It is an arithmetic number, because the mean of its divisors is an integer number (106110650606599).

Almost surely, 2^{212221301213197} is an apocalyptic number.

It is an amenable number.

212221301213197 is a deficient number, since it is larger than the sum of its proper divisors (1).

212221301213197 is an equidigital number, since it uses as much as digits as its factorization.

212221301213197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 212221301213197 in words is "two hundred twelve trillion, two hundred twenty-one billion, three hundred one million, two hundred thirteen thousand, one hundred ninety-seven".