2121001222211 has 2 divisors, whose sum is σ = 2121001222212. Its totient is φ = 2121001222210.

The previous prime is 2121001222129. The next prime is 2121001222253. The reversal of 2121001222211 is 1122221001212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121001222211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2121001222211.

It is not a weakly prime, because it can be changed into another prime (2121001222811) 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, 1060500611105 + 1060500611106.

It is an arithmetic number, because the mean of its divisors is an integer number (1060500611106).

Almost surely, 2^{2121001222211} is an apocalyptic number.

2121001222211 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121001222211 is an equidigital number, since it uses as much as digits as its factorization.

2121001222211 is an odious number, because the sum of its binary digits is odd.

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

Adding to 2121001222211 its reverse (1122221001212), we get a palindrome (3243222223423).

The spelling of 2121001222211 in words is "two trillion, one hundred twenty-one billion, one million, two hundred twenty-two thousand, two hundred eleven".