1201021201217 has 2 divisors, whose sum is σ = 1201021201218. Its totient is φ = 1201021201216.

The previous prime is 1201021201157. The next prime is 1201021201223. The reversal of 1201021201217 is 7121021201021.

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., 1142057706241 + 58963494976 = 1068671^2 + 242824^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201021201217 - 2¹⁸ = 1201020939073 is a prime.

It is not a weakly prime, because it can be changed into another prime (1201021201267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600510600608 + 600510600609.

It is an arithmetic number, because the mean of its divisors is an integer number (600510600609).

Almost surely, 2^{1201021201217} is an apocalyptic number.

It is an amenable number.

1201021201217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201021201217 is an equidigital number, since it uses as much as digits as its factorization.

1201021201217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 20.

Adding to 1201021201217 its reverse (7121021201021), we get a palindrome (8322042402238).

The spelling of 1201021201217 in words is "one trillion, two hundred one billion, twenty-one million, two hundred one thousand, two hundred seventeen".