11212997 has 2 divisors, whose sum is σ = 11212998. Its totient is φ = 11212996.

The previous prime is 11212987. The next prime is 11213057. The reversal of 11212997 is 79921211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9278116 + 1934881 = 3046^2 + 1391^2 .

It is an emirp because it is prime and its reverse (79921211) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11212997 is a prime.

It is a Chen prime.

It is equal to p₇₃₉₆₇₀ and since 11212997 and 739670 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11212987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606498 + 5606499.

It is an arithmetic number, because the mean of its divisors is an integer number (5606499).

Almost surely, 2^11212997 is an apocalyptic number.

It is an amenable number.

11212997 is a deficient number, since it is larger than the sum of its proper divisors (1).

11212997 is an equidigital number, since it uses as much as digits as its factorization.

11212997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268, while the sum is 32.

The square root of 11212997 is about 3348.5813414041. The cubic root of 11212997 is about 223.8243002000.

The spelling of 11212997 in words is "eleven million, two hundred twelve thousand, nine hundred ninety-seven".