221002202112217 has 2 divisors, whose sum is σ = 221002202112218. Its totient is φ = 221002202112216.

The previous prime is 221002202112137. The next prime is 221002202112283. The reversal of 221002202112217 is 712211202200122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220880114065296 + 122088046921 = 14862036^2 + 349411^2 .

It is a cyclic number.

It is not a de Polignac number, because 221002202112217 - 2¹¹ = 221002202110169 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221002202112191 and 221002202112200.

It is not a weakly prime, because it can be changed into another prime (221002202152217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110501101056108 + 110501101056109.

It is an arithmetic number, because the mean of its divisors is an integer number (110501101056109).

Almost surely, 2^{221002202112217} is an apocalyptic number.

It is an amenable number.

221002202112217 is a deficient number, since it is larger than the sum of its proper divisors (1).

221002202112217 is an equidigital number, since it uses as much as digits as its factorization.

221002202112217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 25.

Adding to 221002202112217 its reverse (712211202200122), we get a palindrome (933213404312339).

The spelling of 221002202112217 in words is "two hundred twenty-one trillion, two billion, two hundred two million, one hundred twelve thousand, two hundred seventeen".