12012111001 has 8 divisors (see below), whose sum is σ = 13111703424. Its totient is φ = 10913782320.

The previous prime is 12012110993. The next prime is 12012111019. The reversal of 12012111001 is 10011121021.

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 12012111001 - 2³ = 12012110993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12012111061) 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, 296001 + ... + 334126.

It is an arithmetic number, because the mean of its divisors is an integer number (1638962928).

Almost surely, 2^12012111001 is an apocalyptic number.

12012111001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12012111001 is a deficient number, since it is larger than the sum of its proper divisors (1099592423).

12012111001 is a wasteful number, since it uses less digits than its factorization.

12012111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631871.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 12012111001 its reverse (10011121021), we get a palindrome (22023232022).

It can be divided in two parts, 120 and 12111001, that added together give a palindrome (12111121).

The spelling of 12012111001 in words is "twelve billion, twelve million, one hundred eleven thousand, one".