12120021100111 has 16 divisors (see below), whose sum is σ = 12312245312640. Its totient is φ = 11928780864000.

The previous prime is 12120021100081. The next prime is 12120021100139. The reversal of 12120021100111 is 11100112002121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12120021100111 - 2¹¹ = 12120021098063 is a prime.

It is a super-2 number, since 2×12120021100111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12120021100091 and 12120021100100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123021100111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146411745 + ... + 146494501.

It is an arithmetic number, because the mean of its divisors is an integer number (769515332040).

Almost surely, 2^{12120021100111} is an apocalyptic number.

12120021100111 is a deficient number, since it is larger than the sum of its proper divisors (192224212529).

12120021100111 is an equidigital number, since it uses as much as digits as its factorization.

12120021100111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88674.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 12120021100111 its reverse (11100112002121), we get a palindrome (23220133102232).

The spelling of 12120021100111 in words is "twelve trillion, one hundred twenty billion, twenty-one million, one hundred thousand, one hundred eleven".