12021120111 has 128 divisors (see below), whose sum is σ = 22406823936. Its totient is φ = 5531834880.

The previous prime is 12021120071. The next prime is 12021120113. The reversal of 12021120111 is 11102112021.

It is not a de Polignac number, because 12021120111 - 2¹⁴ = 12021103727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021120113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 7479670 + ... + 7481276.

It is an arithmetic number, because the mean of its divisors is an integer number (175053312).

Almost surely, 2^12021120111 is an apocalyptic number.

12021120111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12021120111 is a deficient number, since it is larger than the sum of its proper divisors (10385703825).

12021120111 is a wasteful number, since it uses less digits than its factorization.

12021120111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1741.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 12021120111 its reverse (11102112021), we get a palindrome (23123232132).

The spelling of 12021120111 in words is "twelve billion, twenty-one million, one hundred twenty thousand, one hundred eleven".