121212200211 has 16 divisors (see below), whose sum is σ = 165404591616. Its totient is φ = 78914648736.

The previous prime is 121212200209. The next prime is 121212200233. The reversal of 121212200211 is 112002212121.

It is not a de Polignac number, because 121212200211 - 2¹ = 121212200209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121212200251) 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 in 15 ways as a sum of consecutive naturals, for example, 659041 + ... + 822653.

It is an arithmetic number, because the mean of its divisors is an integer number (10337786976).

Almost surely, 2^121212200211 is an apocalyptic number.

121212200211 is a deficient number, since it is larger than the sum of its proper divisors (44192391405).

121212200211 is a wasteful number, since it uses less digits than its factorization.

121212200211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169402.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121212200211 its reverse (112002212121), we get a palindrome (233214412332).

The spelling of 121212200211 in words is "one hundred twenty-one billion, two hundred twelve million, two hundred thousand, two hundred eleven".