12111220110121 has 16 divisors (see below), whose sum is σ = 13222012117248. Its totient is φ = 11002058928000.

The previous prime is 12111220109977. The next prime is 12111220110127. The reversal of 12111220110121 is 12101102211121.

It is a cyclic number.

It is not a de Polignac number, because 12111220110121 - 2¹⁵ = 12111220077353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12111220110095 and 12111220110104.

It is not an unprimeable number, because it can be changed into a prime (12111220110127) 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, 121182271 + ... + 121282171.

It is an arithmetic number, because the mean of its divisors is an integer number (826375757328).

Almost surely, 2^{12111220110121} is an apocalyptic number.

12111220110121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12111220110121 is a deficient number, since it is larger than the sum of its proper divisors (1110792007127).

12111220110121 is a wasteful number, since it uses less digits than its factorization.

12111220110121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107952.

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

Adding to 12111220110121 its reverse (12101102211121), we get a palindrome (24212322321242).

The spelling of 12111220110121 in words is "twelve trillion, one hundred eleven billion, two hundred twenty million, one hundred ten thousand, one hundred twenty-one".