1211224193849 has 2 divisors, whose sum is σ = 1211224193850. Its totient is φ = 1211224193848.

The previous prime is 1211224193743. The next prime is 1211224193857. The reversal of 1211224193849 is 9483914221121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1191957365824 + 19266828025 = 1091768^2 + 138805^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211224193849 - 2¹² = 1211224189753 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211224199849) 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, 605612096924 + 605612096925.

It is an arithmetic number, because the mean of its divisors is an integer number (605612096925).

Almost surely, 2^{1211224193849} is an apocalyptic number.

It is an amenable number.

1211224193849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211224193849 is an equidigital number, since it uses as much as digits as its factorization.

1211224193849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 47.

The spelling of 1211224193849 in words is "one trillion, two hundred eleven billion, two hundred twenty-four million, one hundred ninety-three thousand, eight hundred forty-nine".