1212101121211 has 2 divisors, whose sum is σ = 1212101121212. Its totient is φ = 1212101121210.

The previous prime is 1212101121197. The next prime is 1212101121229. The reversal of 1212101121211 is 1121211012121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1212101121211 - 2²³ = 1212092732603 is a prime.

It is not a weakly prime, because it can be changed into another prime (1212101151211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606050560605 + 606050560606.

It is an arithmetic number, because the mean of its divisors is an integer number (606050560606).

Almost surely, 2^{1212101121211} is an apocalyptic number.

1212101121211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212101121211 is an equidigital number, since it uses as much as digits as its factorization.

1212101121211 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 16.

Adding to 1212101121211 its reverse (1121211012121), we get a palindrome (2333312133332).

It can be divided in two parts, 121210 and 1121211, that added together give a palindrome (1242421).

The spelling of 1212101121211 in words is "one trillion, two hundred twelve billion, one hundred one million, one hundred twenty-one thousand, two hundred eleven".