9212112197 has 2 divisors, whose sum is σ = 9212112198. Its totient is φ = 9212112196.

The previous prime is 9212112121. The next prime is 9212112199. The reversal of 9212112197 is 7912112129.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7757910241 + 1454201956 = 88079^2 + 38134^2 .

It is a cyclic number.

It is not a de Polignac number, because 9212112197 - 2¹⁶ = 9212046661 is a prime.

It is a super-2 number, since 2×9212112197² (a number of 21 digits) contains 22 as substring.

Together with 9212112199, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9212112199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4606056098 + 4606056099.

It is an arithmetic number, because the mean of its divisors is an integer number (4606056099).

Almost surely, 2^9212112197 is an apocalyptic number.

It is an amenable number.

9212112197 is a deficient number, since it is larger than the sum of its proper divisors (1).

9212112197 is an equidigital number, since it uses as much as digits as its factorization.

9212112197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 35.

The square root of 9212112197 is about 95979.7488900653. The cubic root of 9212112197 is about 2096.2982554326.

The spelling of 9212112197 in words is "nine billion, two hundred twelve million, one hundred twelve thousand, one hundred ninety-seven".