1211221201207 has 2 divisors, whose sum is σ = 1211221201208. Its totient is φ = 1211221201206.

The previous prime is 1211221201129. The next prime is 1211221201219. The reversal of 1211221201207 is 7021021221121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1211221201207 - 2⁷ = 1211221201079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211221201237) 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, 605610600603 + 605610600604.

It is an arithmetic number, because the mean of its divisors is an integer number (605610600604).

Almost surely, 2^{1211221201207} is an apocalyptic number.

1211221201207 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211221201207 is an equidigital number, since it uses as much as digits as its factorization.

1211221201207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 22.

Adding to 1211221201207 its reverse (7021021221121), we get a palindrome (8232242422328).

The spelling of 1211221201207 in words is "one trillion, two hundred eleven billion, two hundred twenty-one million, two hundred one thousand, two hundred seven".