12111110210121 has 32 divisors (see below), whose sum is σ = 17474937836160. Its totient is φ = 7416755103744.

The previous prime is 12111110210047. The next prime is 12111110210137. The reversal of 12111110210121 is 12101201111121.

It is not a de Polignac number, because 12111110210121 - 2⁹ = 12111110209609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12111110210121.

It is not an unprimeable number, because it can be changed into a prime (12111110210161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17677666 + ... + 18349988.

It is an arithmetic number, because the mean of its divisors is an integer number (546091807380).

Almost surely, 2^{12111110210121} is an apocalyptic number.

It is an amenable number.

12111110210121 is a deficient number, since it is larger than the sum of its proper divisors (5363827626039).

12111110210121 is a wasteful number, since it uses less digits than its factorization.

12111110210121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674585.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 12111110210121 its reverse (12101201111121), we get a palindrome (24212311321242).

The spelling of 12111110210121 in words is "twelve trillion, one hundred eleven billion, one hundred ten million, two hundred ten thousand, one hundred twenty-one".