12122120122111 has 4 divisors (see below), whose sum is σ = 12350839369752. Its totient is φ = 11893400874472.

The previous prime is 12122120121961. The next prime is 12122120122207. The reversal of 12122120122111 is 11122102122121.

It is a happy number.

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 12122120122111 - 2¹⁷ = 12122119991039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122120122811) 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, 114359623741 + ... + 114359623846.

It is an arithmetic number, because the mean of its divisors is an integer number (3087709842438).

Almost surely, 2^{12122120122111} is an apocalyptic number.

12122120122111 is a deficient number, since it is larger than the sum of its proper divisors (228719247641).

12122120122111 is an equidigital number, since it uses as much as digits as its factorization.

12122120122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228719247640.

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

Adding to 12122120122111 its reverse (11122102122121), we get a palindrome (23244222244232).

The spelling of 12122120122111 in words is "twelve trillion, one hundred twenty-two billion, one hundred twenty million, one hundred twenty-two thousand, one hundred eleven".