12200121211 has 4 divisors (see below), whose sum is σ = 12227661432. Its totient is φ = 12172580992.

The previous prime is 12200121191. The next prime is 12200121221. The reversal of 12200121211 is 11212100221.

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 12200121211 - 2¹⁵ = 12200088443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12200121191 and 12200121200.

It is not an unprimeable number, because it can be changed into a prime (12200121221) 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, 13769446 + ... + 13770331.

It is an arithmetic number, because the mean of its divisors is an integer number (3056915358).

Almost surely, 2^12200121211 is an apocalyptic number.

12200121211 is a deficient number, since it is larger than the sum of its proper divisors (27540221).

12200121211 is an equidigital number, since it uses as much as digits as its factorization.

12200121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27540220.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12200121211 its reverse (11212100221), we get a palindrome (23412221432).

The spelling of 12200121211 in words is "twelve billion, two hundred million, one hundred twenty-one thousand, two hundred eleven".