12001220122111 has 16 divisors (see below), whose sum is σ = 13118871870720. Its totient is φ = 10888009001920.

The previous prime is 12001220122103. The next prime is 12001220122117. The reversal of 12001220122111 is 11122102210021.

It is a cyclic number.

It is not a de Polignac number, because 12001220122111 - 2³ = 12001220122103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001220122117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177071916 + ... + 177139678.

It is an arithmetic number, because the mean of its divisors is an integer number (819929491920).

Almost surely, 2^{12001220122111} is an apocalyptic number.

12001220122111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12001220122111 is a deficient number, since it is larger than the sum of its proper divisors (1117651748609).

12001220122111 is a wasteful number, since it uses less digits than its factorization.

12001220122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100286.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12001220122111 its reverse (11122102210021), we get a palindrome (23123322332132).

The spelling of 12001220122111 in words is "twelve trillion, one billion, two hundred twenty million, one hundred twenty-two thousand, one hundred eleven".