1211444303197 has 2 divisors, whose sum is σ = 1211444303198. Its totient is φ = 1211444303196.

The previous prime is 1211444303137. The next prime is 1211444303203. The reversal of 1211444303197 is 7913034441121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1113909265561 + 97535037636 = 1055419^2 + 312306^2 .

It is an emirp because it is prime and its reverse (7913034441121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211444303197 is a prime.

It is a super-3 number, since 3×1211444303197³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211444303137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605722151598 + 605722151599.

It is an arithmetic number, because the mean of its divisors is an integer number (605722151599).

Almost surely, 2^{1211444303197} is an apocalyptic number.

It is an amenable number.

1211444303197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211444303197 is an equidigital number, since it uses as much as digits as its factorization.

1211444303197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 40.

The spelling of 1211444303197 in words is "one trillion, two hundred eleven billion, four hundred forty-four million, three hundred three thousand, one hundred ninety-seven".