1200120220217 has 2 divisors, whose sum is σ = 1200120220218. Its totient is φ = 1200120220216.

The previous prime is 1200120220193. The next prime is 1200120220279. The reversal of 1200120220217 is 7120220210021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1191090659641 + 9029560576 = 1091371^2 + 95024^2 .

It is a cyclic number.

It is not a de Polignac number, because 1200120220217 - 2¹² = 1200120216121 is a prime.

It is not a weakly prime, because it can be changed into another prime (1200120220417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600060110108 + 600060110109.

It is an arithmetic number, because the mean of its divisors is an integer number (600060110109).

Almost surely, 2^{1200120220217} is an apocalyptic number.

It is an amenable number.

1200120220217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200120220217 is an equidigital number, since it uses as much as digits as its factorization.

1200120220217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 20.

Adding to 1200120220217 its reverse (7120220210021), we get a palindrome (8320340430238).

The spelling of 1200120220217 in words is "one trillion, two hundred billion, one hundred twenty million, two hundred twenty thousand, two hundred seventeen".