121211111201 has 2 divisors, whose sum is σ = 121211111202. Its totient is φ = 121211111200.

The previous prime is 121211111191. The next prime is 121211111227. The reversal of 121211111201 is 102111112121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118232134801 + 2978976400 = 343849^2 + 54580^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121211111201 is a prime.

It is not a weakly prime, because it can be changed into another prime (121211111501) 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, 60605555600 + 60605555601.

It is an arithmetic number, because the mean of its divisors is an integer number (60605555601).

Almost surely, 2^121211111201 is an apocalyptic number.

It is an amenable number.

121211111201 is a deficient number, since it is larger than the sum of its proper divisors (1).

121211111201 is an equidigital number, since it uses as much as digits as its factorization.

121211111201 is an odious number, because the sum of its binary digits is odd.

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

Adding to 121211111201 its reverse (102111112121), we get a palindrome (223322223322).

The spelling of 121211111201 in words is "one hundred twenty-one billion, two hundred eleven million, one hundred eleven thousand, two hundred one".