121222216211 has 2 divisors, whose sum is σ = 121222216212. Its totient is φ = 121222216210.

The previous prime is 121222216189. The next prime is 121222216249. The reversal of 121222216211 is 112612222121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121222216211 - 2¹⁰ = 121222215187 is a prime.

It is not a weakly prime, because it can be changed into another prime (121222212211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60611108105 + 60611108106.

It is an arithmetic number, because the mean of its divisors is an integer number (60611108106).

Almost surely, 2^121222216211 is an apocalyptic number.

121222216211 is a deficient number, since it is larger than the sum of its proper divisors (1).

121222216211 is an equidigital number, since it uses as much as digits as its factorization.

121222216211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 23.

Adding to 121222216211 its reverse (112612222121), we get a palindrome (233834438332).

The spelling of 121222216211 in words is "one hundred twenty-one billion, two hundred twenty-two million, two hundred sixteen thousand, two hundred eleven".