1211199497 has 2 divisors, whose sum is σ = 1211199498. Its totient is φ = 1211199496.

The previous prime is 1211199463. The next prime is 1211199499. The reversal of 1211199497 is 7949911121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1186389136 + 24810361 = 34444^2 + 4981^2 .

It is an emirp because it is prime and its reverse (7949911121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1211199497 - 2⁶ = 1211199433 is a prime.

Together with 1211199499, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1211199499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605599748 + 605599749.

It is an arithmetic number, because the mean of its divisors is an integer number (605599749).

Almost surely, 2^1211199497 is an apocalyptic number.

It is an amenable number.

1211199497 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211199497 is an equidigital number, since it uses as much as digits as its factorization.

1211199497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 44.

The square root of 1211199497 is about 34802.2915481150. The cubic root of 1211199497 is about 1065.9542380214.

The spelling of 1211199497 in words is "one billion, two hundred eleven million, one hundred ninety-nine thousand, four hundred ninety-seven".