121222212211 has 2 divisors, whose sum is σ = 121222212212. Its totient is φ = 121222212210.

The previous prime is 121222212187. The next prime is 121222212301. The reversal of 121222212211 is 112212222121.

It is a weak prime.

It is an emirp because it is prime and its reverse (112212222121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121222212211 - 2¹⁷ = 121222081139 is a prime.

It is not a weakly prime, because it can be changed into another prime (121222216211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60611106105 + 60611106106.

It is an arithmetic number, because the mean of its divisors is an integer number (60611106106).

Almost surely, 2^121222212211 is an apocalyptic number.

121222212211 is a deficient number, since it is larger than the sum of its proper divisors (1).

121222212211 is an equidigital number, since it uses as much as digits as its factorization.

121222212211 is an evil number, because the sum of its binary digits is even.

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

Adding to 121222212211 its reverse (112212222121), we get a palindrome (233434434332).

The spelling of 121222212211 in words is "one hundred twenty-one billion, two hundred twenty-two million, two hundred twelve thousand, two hundred eleven".