111220021210217 has 2 divisors, whose sum is σ = 111220021210218. Its totient is φ = 111220021210216.

The previous prime is 111220021210147. The next prime is 111220021210261. The reversal of 111220021210217 is 712012120022111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110902403302441 + 317617907776 = 10531021^2 + 563576^2 .

It is a cyclic number.

It is not a de Polignac number, because 111220021210217 - 2¹⁸ = 111220020948073 is a prime.

It is a super-2 number, since 2×111220021210217² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111220021210192 and 111220021210201.

It is not a weakly prime, because it can be changed into another prime (111220021218217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55610010605108 + 55610010605109.

It is an arithmetic number, because the mean of its divisors is an integer number (55610010605109).

Almost surely, 2^{111220021210217} is an apocalyptic number.

It is an amenable number.

111220021210217 is a deficient number, since it is larger than the sum of its proper divisors (1).

111220021210217 is an equidigital number, since it uses as much as digits as its factorization.

111220021210217 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 23.

Adding to 111220021210217 its reverse (712012120022111), we get a palindrome (823232141232328).

The spelling of 111220021210217 in words is "one hundred eleven trillion, two hundred twenty billion, twenty-one million, two hundred ten thousand, two hundred seventeen".