1201212217 has 2 divisors, whose sum is σ = 1201212218. Its totient is φ = 1201212216.

The previous prime is 1201212209. The next prime is 1201212253. The reversal of 1201212217 is 7122121021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 654541056 + 546671161 = 25584^2 + 23381^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201212217 - 2³ = 1201212209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1201212194 and 1201212203.

It is not a weakly prime, because it can be changed into another prime (1201212517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600606108 + 600606109.

It is an arithmetic number, because the mean of its divisors is an integer number (600606109).

Almost surely, 2^1201212217 is an apocalyptic number.

It is an amenable number.

1201212217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201212217 is an equidigital number, since it uses as much as digits as its factorization.

1201212217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 1201212217 is about 34658.5085801452. The cubic root of 1201212217 is about 1063.0162745336.

Adding to 1201212217 its reverse (7122121021), we get a palindrome (8323333238).

The spelling of 1201212217 in words is "one billion, two hundred one million, two hundred twelve thousand, two hundred seventeen".