221102000122121 has 2 divisors, whose sum is σ = 221102000122122. Its totient is φ = 221102000122120.

The previous prime is 221102000122099. The next prime is 221102000122183. The reversal of 221102000122121 is 121221000201122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113527661164096 + 107574338958025 = 10654936^2 + 10371805^2 .

It is a cyclic number.

It is not a de Polignac number, because 221102000122121 - 2¹⁴ = 221102000105737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221102000122121.

It is not a weakly prime, because it can be changed into another prime (221102000122021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110551000061060 + 110551000061061.

It is an arithmetic number, because the mean of its divisors is an integer number (110551000061061).

Almost surely, 2^{221102000122121} is an apocalyptic number.

It is an amenable number.

221102000122121 is a deficient number, since it is larger than the sum of its proper divisors (1).

221102000122121 is an equidigital number, since it uses as much as digits as its factorization.

221102000122121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221102000122121 its reverse (121221000201122), we get a palindrome (342323000323243).

The spelling of 221102000122121 in words is "two hundred twenty-one trillion, one hundred two billion, one hundred twenty-two thousand, one hundred twenty-one".