1211104457 has 2 divisors, whose sum is σ = 1211104458. Its totient is φ = 1211104456.

The previous prime is 1211104379. The next prime is 1211104459. The reversal of 1211104457 is 7544011121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 745235401 + 465869056 = 27299^2 + 21584^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211104457 - 2⁸ = 1211104201 is a prime.

Together with 1211104459, 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 (1211104459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605552228 + 605552229.

It is an arithmetic number, because the mean of its divisors is an integer number (605552229).

Almost surely, 2^1211104457 is an apocalyptic number.

It is an amenable number.

1211104457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211104457 is an equidigital number, since it uses as much as digits as its factorization.

1211104457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 1211104457 is about 34800.9260939993. The cubic root of 1211104457 is about 1065.9263563110.

Adding to 1211104457 its reverse (7544011121), we get a palindrome (8755115578).

The spelling of 1211104457 in words is "one billion, two hundred eleven million, one hundred four thousand, four hundred fifty-seven".