201212122220111 has 2 divisors, whose sum is σ = 201212122220112. Its totient is φ = 201212122220110.

The previous prime is 201212122220107. The next prime is 201212122220141. The reversal of 201212122220111 is 111022221212102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201212122220111 - 2² = 201212122220107 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201212122220141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100606061110055 + 100606061110056.

It is an arithmetic number, because the mean of its divisors is an integer number (100606061110056).

Almost surely, 2^{201212122220111} is an apocalyptic number.

201212122220111 is a deficient number, since it is larger than the sum of its proper divisors (1).

201212122220111 is an equidigital number, since it uses as much as digits as its factorization.

201212122220111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 201212122220111 its reverse (111022221212102), we get a palindrome (312234343432213).

The spelling of 201212122220111 in words is "two hundred one trillion, two hundred twelve billion, one hundred twenty-two million, two hundred twenty thousand, one hundred eleven".