12122121202211 has 4 divisors (see below), whose sum is σ = 12122586729624. Its totient is φ = 12121655674800.

The previous prime is 12122121202193. The next prime is 12122121202259. The reversal of 12122121202211 is 11220212122121.

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 12122121202211 - 2³⁰ = 12121047460387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12122121202271) 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, 232724645 + ... + 232776726.

It is an arithmetic number, because the mean of its divisors is an integer number (3030646682406).

Almost surely, 2^{12122121202211} is an apocalyptic number.

12122121202211 is a deficient number, since it is larger than the sum of its proper divisors (465527413).

12122121202211 is an equidigital number, since it uses as much as digits as its factorization.

12122121202211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465527412.

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

Adding to 12122121202211 its reverse (11220212122121), we get a palindrome (23342333324332).

The spelling of 12122121202211 in words is "twelve trillion, one hundred twenty-two billion, one hundred twenty-one million, two hundred two thousand, two hundred eleven".