210011220222121 has 2 divisors, whose sum is σ = 210011220222122. Its totient is φ = 210011220222120.

The previous prime is 210011220222059. The next prime is 210011220222157. The reversal of 210011220222121 is 121222022110012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133288756755625 + 76722463466496 = 11545075^2 + 8759136^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210011220222121 is a prime.

It is not a weakly prime, because it can be changed into another prime (210011220222421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105005610111060 + 105005610111061.

It is an arithmetic number, because the mean of its divisors is an integer number (105005610111061).

Almost surely, 2^{210011220222121} is an apocalyptic number.

It is an amenable number.

210011220222121 is a deficient number, since it is larger than the sum of its proper divisors (1).

210011220222121 is an equidigital number, since it uses as much as digits as its factorization.

210011220222121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 210011220222121 its reverse (121222022110012), we get a palindrome (331233242332133).

The spelling of 210011220222121 in words is "two hundred ten trillion, eleven billion, two hundred twenty million, two hundred twenty-two thousand, one hundred twenty-one".