1212000197 has 2 divisors, whose sum is σ = 1212000198. Its totient is φ = 1212000196.

The previous prime is 1212000187. The next prime is 1212000217. The reversal of 1212000197 is 7910002121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1070532961 + 141467236 = 32719^2 + 11894^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212000197 - 2⁸ = 1211999941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212000187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606000098 + 606000099.

It is an arithmetic number, because the mean of its divisors is an integer number (606000099).

Almost surely, 2^1212000197 is an apocalyptic number.

It is an amenable number.

1212000197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212000197 is an equidigital number, since it uses as much as digits as its factorization.

1212000197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 1212000197 is about 34813.7932003969. The cubic root of 1212000197 is about 1066.1890800244.

The spelling of 1212000197 in words is "one billion, two hundred twelve million, one hundred ninety-seven", and thus it is an aban number.