12120110111021 has 16 divisors (see below), whose sum is σ = 13928381913600. Its totient is φ = 10430458254000.

The previous prime is 12120110111009. The next prime is 12120110111027. The reversal of 12120110111021 is 12011101102121.

It is a cyclic number.

It is not a de Polignac number, because 12120110111021 - 2¹⁰ = 12120110109997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12120110110987 and 12120110111005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120110111027) 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, 21707255 + ... + 22258596.

It is an arithmetic number, because the mean of its divisors is an integer number (870523869600).

Almost surely, 2^{12120110111021} is an apocalyptic number.

12120110111021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12120110111021 is a deficient number, since it is larger than the sum of its proper divisors (1808271802579).

12120110111021 is a wasteful number, since it uses less digits than its factorization.

12120110111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43967200.

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

Adding to 12120110111021 its reverse (12011101102121), we get a palindrome (24131211213142).

The spelling of 12120110111021 in words is "twelve trillion, one hundred twenty billion, one hundred ten million, one hundred eleven thousand, twenty-one".