12021210111 has 12 divisors (see below), whose sum is σ = 16916275032. Its totient is φ = 7592342544.

The previous prime is 12021210059. The next prime is 12021210167. The reversal of 12021210111 is 11101212021.

It is not a de Polignac number, because 12021210111 - 2¹⁷ = 12021079039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021210011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5548876 + ... + 5551041.

It is an arithmetic number, because the mean of its divisors is an integer number (1409689586).

Almost surely, 2^12021210111 is an apocalyptic number.

12021210111 is a deficient number, since it is larger than the sum of its proper divisors (4895064921).

12021210111 is a wasteful number, since it uses less digits than its factorization.

12021210111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11099958 (or 11099939 counting only the distinct ones).

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

Adding to 12021210111 its reverse (11101212021), we get a palindrome (23122422132).

The spelling of 12021210111 in words is "twelve billion, twenty-one million, two hundred ten thousand, one hundred eleven".