2111001220217 has 2 divisors, whose sum is σ = 2111001220218. Its totient is φ = 2111001220216.

The previous prime is 2111001220187. The next prime is 2111001220253. The reversal of 2111001220217 is 7120221001112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1857649057936 + 253352162281 = 1362956^2 + 503341^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111001220217 - 2¹⁴ = 2111001203833 is a prime.

It is not a weakly prime, because it can be changed into another prime (2111001220417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055500610108 + 1055500610109.

It is an arithmetic number, because the mean of its divisors is an integer number (1055500610109).

Almost surely, 2^{2111001220217} is an apocalyptic number.

It is an amenable number.

2111001220217 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111001220217 is an equidigital number, since it uses as much as digits as its factorization.

2111001220217 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 2111001220217 its reverse (7120221001112), we get a palindrome (9231222221329).

The spelling of 2111001220217 in words is "two trillion, one hundred eleven billion, one million, two hundred twenty thousand, two hundred seventeen".