12211000121 has 4 divisors (see below), whose sum is σ = 12494976912. Its totient is φ = 11927023332.

The previous prime is 12211000117. The next prime is 12211000133. The reversal of 12211000121 is 12100011221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12211000121 - 2² = 12211000117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12211006121) 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 3 ways as a sum of consecutive naturals, for example, 141988331 + ... + 141988416.

It is an arithmetic number, because the mean of its divisors is an integer number (3123744228).

Almost surely, 2^12211000121 is an apocalyptic number.

It is an amenable number.

12211000121 is a deficient number, since it is larger than the sum of its proper divisors (283976791).

12211000121 is an equidigital number, since it uses as much as digits as its factorization.

12211000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283976790.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 12211000121 its reverse (12100011221), we get a palindrome (24311011342).

The spelling of 12211000121 in words is "twelve billion, two hundred eleven million, one hundred twenty-one", and thus it is an aban number.