12121100112011 has 12 divisors (see below), whose sum is σ = 13381885194216. Its totient is φ = 10970639243520.

The previous prime is 12121100112007. The next prime is 12121100112013. The reversal of 12121100112011 is 11021100112121.

It is not a de Polignac number, because 12121100112011 - 2² = 12121100112007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12121100112013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 220620950 + ... + 220675883.

It is an arithmetic number, because the mean of its divisors is an integer number (1115157099518).

Almost surely, 2^{12121100112011} is an apocalyptic number.

12121100112011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12121100112011 is a deficient number, since it is larger than the sum of its proper divisors (1260785082205).

12121100112011 is a wasteful number, since it uses less digits than its factorization.

12121100112011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441297082 (or 441297071 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 12121100112011 its reverse (11021100112121), we get a palindrome (23142200224132).

The spelling of 12121100112011 in words is "twelve trillion, one hundred twenty-one billion, one hundred million, one hundred twelve thousand, eleven".