1011220212217 has 2 divisors, whose sum is σ = 1011220212218. Its totient is φ = 1011220212216.

The previous prime is 1011220212193. The next prime is 1011220212293. The reversal of 1011220212217 is 7122120221101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 776083473936 + 235136738281 = 880956^2 + 484909^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011220212217 is a prime.

It is not a weakly prime, because it can be changed into another prime (1011220212017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505610106108 + 505610106109.

It is an arithmetic number, because the mean of its divisors is an integer number (505610106109).

Almost surely, 2^{1011220212217} is an apocalyptic number.

It is an amenable number.

1011220212217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011220212217 is an equidigital number, since it uses as much as digits as its factorization.

1011220212217 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 22.

Adding to 1011220212217 its reverse (7122120221101), we get a palindrome (8133340433318).

The spelling of 1011220212217 in words is "one trillion, eleven billion, two hundred twenty million, two hundred twelve thousand, two hundred seventeen".