12012120111 has 8 divisors (see below), whose sum is σ = 16020108720. Its totient is φ = 8006105792.

The previous prime is 12012120103. The next prime is 12012120149. The reversal of 12012120111 is 11102121021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12012120111 - 2³ = 12012120103 is a prime.

It is a super-2 number, since 2×12012120111² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012120611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 479316 + ... + 503753.

It is an arithmetic number, because the mean of its divisors is an integer number (2002513590).

Almost surely, 2^12012120111 is an apocalyptic number.

12012120111 is a deficient number, since it is larger than the sum of its proper divisors (4007988609).

12012120111 is an equidigital number, since it uses as much as digits as its factorization.

12012120111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987145.

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

Adding to 12012120111 its reverse (11102121021), we get a palindrome (23114241132).

The spelling of 12012120111 in words is "twelve billion, twelve million, one hundred twenty thousand, one hundred eleven".