221210222212117 has 2 divisors, whose sum is σ = 221210222212118. Its totient is φ = 221210222212116.

The previous prime is 221210222212079. The next prime is 221210222212163. The reversal of 221210222212117 is 711212222012122.

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., 220167401365521 + 1042820846596 = 14838039^2 + 1021186^2 .

It is a cyclic number.

It is not a de Polignac number, because 221210222212117 - 2⁴⁷ = 80472733856789 is a prime.

It is a super-2 number, since 2×221210222212117² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221210222212817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110605111106058 + 110605111106059.

It is an arithmetic number, because the mean of its divisors is an integer number (110605111106059).

Almost surely, 2^{221210222212117} is an apocalyptic number.

It is an amenable number.

221210222212117 is a deficient number, since it is larger than the sum of its proper divisors (1).

221210222212117 is an equidigital number, since it uses as much as digits as its factorization.

221210222212117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1792, while the sum is 28.

Adding to 221210222212117 its reverse (711212222012122), we get a palindrome (932422444224239).

The spelling of 221210222212117 in words is "two hundred twenty-one trillion, two hundred ten billion, two hundred twenty-two million, two hundred twelve thousand, one hundred seventeen".