1211104412257 has 2 divisors, whose sum is σ = 1211104412258. Its totient is φ = 1211104412256.

The previous prime is 1211104412213. The next prime is 1211104412263. The reversal of 1211104412257 is 7522144011121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 984270346816 + 226834065441 = 992104^2 + 476271^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211104412257 - 2⁷ = 1211104412129 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211104413257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605552206128 + 605552206129.

It is an arithmetic number, because the mean of its divisors is an integer number (605552206129).

Almost surely, 2^{1211104412257} is an apocalyptic number.

It is an amenable number.

1211104412257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211104412257 is an equidigital number, since it uses as much as digits as its factorization.

1211104412257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4480, while the sum is 31.

Adding to 1211104412257 its reverse (7522144011121), we get a palindrome (8733248423378).

The spelling of 1211104412257 in words is "one trillion, two hundred eleven billion, one hundred four million, four hundred twelve thousand, two hundred fifty-seven".