1211209983337 has 2 divisors, whose sum is σ = 1211209983338. Its totient is φ = 1211209983336.

The previous prime is 1211209983289. The next prime is 1211209983367. The reversal of 1211209983337 is 7333899021121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1153037849616 + 58172133721 = 1073796^2 + 241189^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211209983337 - 2⁷ = 1211209983209 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211209983367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605604991668 + 605604991669.

It is an arithmetic number, because the mean of its divisors is an integer number (605604991669).

Almost surely, 2^{1211209983337} is an apocalyptic number.

It is an amenable number.

1211209983337 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211209983337 is an equidigital number, since it uses as much as digits as its factorization.

1211209983337 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888, while the sum is 49.

The spelling of 1211209983337 in words is "one trillion, two hundred eleven billion, two hundred nine million, nine hundred eighty-three thousand, three hundred thirty-seven".