12111210023121 has 24 divisors (see below), whose sum is σ = 19084544416704. Its totient is φ = 7340045182560.

The previous prime is 12111210023117. The next prime is 12111210023123. The reversal of 12111210023121 is 12132001211121.

It is a happy number.

It is not a de Polignac number, because 12111210023121 - 2² = 12111210023117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12111210023094 and 12111210023103.

It is not an unprimeable number, because it can be changed into a prime (12111210023123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8883420 + ... + 10155666.

It is an arithmetic number, because the mean of its divisors is an integer number (795189350696).

Almost surely, 2^{12111210023121} is an apocalyptic number.

12111210023121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12111210023121 is a deficient number, since it is larger than the sum of its proper divisors (6973334393583).

12111210023121 is a wasteful number, since it uses less digits than its factorization.

12111210023121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1368421 (or 1368418 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 12111210023121 its reverse (12132001211121), we get a palindrome (24243211234242).

The spelling of 12111210023121 in words is "twelve trillion, one hundred eleven billion, two hundred ten million, twenty-three thousand, one hundred twenty-one".