12122212220111 has 8 divisors (see below), whose sum is σ = 13854125712384. Its totient is φ = 10390340950200.

The previous prime is 12122212220087. The next prime is 12122212220113. The reversal of 12122212220111 is 11102221222121.

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 12122212220111 - 2⁶ = 12122212220047 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 (12122212220113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9937955 + ... + 11090868.

It is an arithmetic number, because the mean of its divisors is an integer number (1731765714048).

Almost surely, 2^{12122212220111} is an apocalyptic number.

12122212220111 is a deficient number, since it is larger than the sum of its proper divisors (1731913492273).

12122212220111 is an equidigital number, since it uses as much as digits as its factorization.

12122212220111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21111181.

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

Adding to 12122212220111 its reverse (11102221222121), we get a palindrome (23224433442232).

The spelling of 12122212220111 in words is "twelve trillion, one hundred twenty-two billion, two hundred twelve million, two hundred twenty thousand, one hundred eleven".