222210121000121 has 2 divisors, whose sum is σ = 222210121000122. Its totient is φ = 222210121000120.

The previous prime is 222210121000093. The next prime is 222210121000139. The reversal of 222210121000121 is 121000121012222.

222210121000121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 221442375283600 + 767745716521 = 14880940^2 + 876211^2 .

It is a cyclic number.

It is not a de Polignac number, because 222210121000121 - 2²⁶ = 222210053891257 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 222210121000121.

It is not a weakly prime, because it can be changed into another prime (222210121000141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111105060500060 + 111105060500061.

It is an arithmetic number, because the mean of its divisors is an integer number (111105060500061).

Almost surely, 2^{222210121000121} is an apocalyptic number.

It is an amenable number.

222210121000121 is a deficient number, since it is larger than the sum of its proper divisors (1).

222210121000121 is an equidigital number, since it uses as much as digits as its factorization.

222210121000121 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 222210121000121 its reverse (121000121012222), we get a palindrome (343210242012343).

The spelling of 222210121000121 in words is "two hundred twenty-two trillion, two hundred ten billion, one hundred twenty-one million, one hundred twenty-one", and thus it is an aban number.