121201111211 has 2 divisors, whose sum is σ = 121201111212. Its totient is φ = 121201111210.

The previous prime is 121201111177. The next prime is 121201111217. The reversal of 121201111211 is 112111102121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121201111211 - 2⁶ = 121201111147 is a prime.

It is not a weakly prime, because it can be changed into another prime (121201111217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60600555605 + 60600555606.

It is an arithmetic number, because the mean of its divisors is an integer number (60600555606).

Almost surely, 2^121201111211 is an apocalyptic number.

121201111211 is a deficient number, since it is larger than the sum of its proper divisors (1).

121201111211 is an equidigital number, since it uses as much as digits as its factorization.

121201111211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 121201111211 its reverse (112111102121), we get a palindrome (233312213332).

The spelling of 121201111211 in words is "one hundred twenty-one billion, two hundred one million, one hundred eleven thousand, two hundred eleven".