12012121111001 has 8 divisors (see below), whose sum is σ = 13793823285600. Its totient is φ = 10345367463840.

The previous prime is 12012121110917. The next prime is 12012121111009. The reversal of 12012121111001 is 10011112121021.

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 12012121111001 - 2⁴² = 7614074599897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12012121111009) 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, 28737131636 + ... + 28737132053.

It is an arithmetic number, because the mean of its divisors is an integer number (1724227910700).

Almost surely, 2^{12012121111001} is an apocalyptic number.

12012121111001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12012121111001 is a deficient number, since it is larger than the sum of its proper divisors (1781702174599).

12012121111001 is a wasteful number, since it uses less digits than its factorization.

12012121111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57474263719.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 12012121111001 its reverse (10011112121021), we get a palindrome (22023233232022).

The spelling of 12012121111001 in words is "twelve trillion, twelve billion, one hundred twenty-one million, one hundred eleven thousand, one".