121220001211 has 2 divisors, whose sum is σ = 121220001212. Its totient is φ = 121220001210.

The previous prime is 121220001209. The next prime is 121220001223. The reversal of 121220001211 is 112100022121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 121220001211 - 2¹ = 121220001209 is a prime.

Together with 121220001209, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 121220001191 and 121220001200.

It is not a weakly prime, because it can be changed into another prime (121220001281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610000605 + 60610000606.

It is an arithmetic number, because the mean of its divisors is an integer number (60610000606).

Almost surely, 2^121220001211 is an apocalyptic number.

121220001211 is a deficient number, since it is larger than the sum of its proper divisors (1).

121220001211 is an equidigital number, since it uses as much as digits as its factorization.

121220001211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 121220001211 its reverse (112100022121), we get a palindrome (233320023332).

The spelling of 121220001211 in words is "one hundred twenty-one billion, two hundred twenty million, one thousand, two hundred eleven".