12122111220211 has 8 divisors (see below), whose sum is σ = 12132194213744. Its totient is φ = 12112031463840.

The previous prime is 12122111220209. The next prime is 12122111220217. The reversal of 12122111220211 is 11202211122121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12122111220211 - 2¹ = 12122111220209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12122111220217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6712201 + ... + 8324533.

It is an arithmetic number, because the mean of its divisors is an integer number (1516524276718).

Almost surely, 2^{12122111220211} is an apocalyptic number.

12122111220211 is a deficient number, since it is larger than the sum of its proper divisors (10082993533).

12122111220211 is a wasteful number, since it uses less digits than its factorization.

12122111220211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1618581.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 12122111220211 its reverse (11202211122121), we get a palindrome (23324322342332).

The spelling of 12122111220211 in words is "twelve trillion, one hundred twenty-two billion, one hundred eleven million, two hundred twenty thousand, two hundred eleven".