1201211022217 has 2 divisors, whose sum is σ = 1201211022218. Its totient is φ = 1201211022216.

The previous prime is 1201211022211. The next prime is 1201211022239. The reversal of 1201211022217 is 7122201121021.

It is an a-pointer prime, because the next prime (1201211022239) can be obtained adding 1201211022217 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 854559731776 + 346651290441 = 924424^2 + 588771^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201211022217 is a prime.

It is a super-2 number, since 2×1201211022217² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1201211022211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600605511108 + 600605511109.

It is an arithmetic number, because the mean of its divisors is an integer number (600605511109).

Almost surely, 2^{1201211022217} is an apocalyptic number.

It is an amenable number.

1201211022217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201211022217 is an equidigital number, since it uses as much as digits as its factorization.

1201211022217 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 1201211022217 its reverse (7122201121021), we get a palindrome (8323412143238).

The spelling of 1201211022217 in words is "one trillion, two hundred one billion, two hundred eleven million, twenty-two thousand, two hundred seventeen".