121211200211 has 4 divisors (see below), whose sum is σ = 125390896800. Its totient is φ = 117031503624.

The previous prime is 121211200129. The next prime is 121211200223. The reversal of 121211200211 is 112002112121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121211200211 - 2¹⁴ = 121211183827 is a prime.

It is a super-2 number, since 2×121211200211² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121211200241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2089848251 + ... + 2089848308.

It is an arithmetic number, because the mean of its divisors is an integer number (31347724200).

Almost surely, 2^121211200211 is an apocalyptic number.

121211200211 is a deficient number, since it is larger than the sum of its proper divisors (4179696589).

121211200211 is an equidigital number, since it uses as much as digits as its factorization.

121211200211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4179696588.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121211200211 its reverse (112002112121), we get a palindrome (233213312332).

The spelling of 121211200211 in words is "one hundred twenty-one billion, two hundred eleven million, two hundred thousand, two hundred eleven".