221000201212117 has 2 divisors, whose sum is σ = 221000201212118. Its totient is φ = 221000201212116.

The previous prime is 221000201212073. The next prime is 221000201212207. The reversal of 221000201212117 is 711212102000122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 194219928110961 + 26780273101156 = 13936281^2 + 5174966^2 .

It is a cyclic number.

It is not a de Polignac number, because 221000201212117 - 2¹⁵ = 221000201179349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221000201212717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110500100606058 + 110500100606059.

It is an arithmetic number, because the mean of its divisors is an integer number (110500100606059).

Almost surely, 2^{221000201212117} is an apocalyptic number.

It is an amenable number.

221000201212117 is a deficient number, since it is larger than the sum of its proper divisors (1).

221000201212117 is an equidigital number, since it uses as much as digits as its factorization.

221000201212117 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 22.

Adding to 221000201212117 its reverse (711212102000122), we get a palindrome (932212303212239).

The spelling of 221000201212117 in words is "two hundred twenty-one trillion, two hundred one million, two hundred twelve thousand, one hundred seventeen".