12012221111 has 8 divisors (see below), whose sum is σ = 13116070800. Its totient is φ = 10910343040.

The previous prime is 12012221071. The next prime is 12012221119. The reversal of 12012221111 is 11112221021.

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 12012221111 - 2¹⁴ = 12012204727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012221119) 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, 480146 + ... + 504543.

It is an arithmetic number, because the mean of its divisors is an integer number (1639508850).

Almost surely, 2^12012221111 is an apocalyptic number.

12012221111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12012221111 is a deficient number, since it is larger than the sum of its proper divisors (1103849689).

12012221111 is a wasteful number, since it uses less digits than its factorization.

12012221111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985809.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12012221111 its reverse (11112221021), we get a palindrome (23124442132).

The spelling of 12012221111 in words is "twelve billion, twelve million, two hundred twenty-one thousand, one hundred eleven".