121212222001211 has 16 divisors (see below), whose sum is σ = 132327971612928. Its totient is φ = 110112556725600.

The previous prime is 121212222001159. The next prime is 121212222001223. The reversal of 121212222001211 is 112100222212121.

It is not a de Polignac number, because 121212222001211 - 2²² = 121212217806907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121212222001271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 310257485 + ... + 310647921.

It is an arithmetic number, because the mean of its divisors is an integer number (8270498225808).

Almost surely, 2^{121212222001211} is an apocalyptic number.

121212222001211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121212222001211 is a deficient number, since it is larger than the sum of its proper divisors (11115749611717).

121212222001211 is a wasteful number, since it uses less digits than its factorization.

121212222001211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410962.

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

Adding to 121212222001211 its reverse (112100222212121), we get a palindrome (233312444213332).

The spelling of 121212222001211 in words is "one hundred twenty-one trillion, two hundred twelve billion, two hundred twenty-two million, one thousand, two hundred eleven".