101221110217 has 2 divisors, whose sum is σ = 101221110218. Its totient is φ = 101221110216.

The previous prime is 101221110203. The next prime is 101221110227. The reversal of 101221110217 is 712011122101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93046961296 + 8174148921 = 305036^2 + 90411^2 .

It is a cyclic number.

It is not a de Polignac number, because 101221110217 - 2²³ = 101212721609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 101221110194 and 101221110203.

It is not a weakly prime, because it can be changed into another prime (101221110227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50610555108 + 50610555109.

It is an arithmetic number, because the mean of its divisors is an integer number (50610555109).

Almost surely, 2^101221110217 is an apocalyptic number.

It is an amenable number.

101221110217 is a deficient number, since it is larger than the sum of its proper divisors (1).

101221110217 is an equidigital number, since it uses as much as digits as its factorization.

101221110217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 19.

Adding to 101221110217 its reverse (712011122101), we get a palindrome (813232232318).

The spelling of 101221110217 in words is "one hundred one billion, two hundred twenty-one million, one hundred ten thousand, two hundred seventeen".