12012112001 has 4 divisors (see below), whose sum is σ = 12013021104. Its totient is φ = 12011202900.

The previous prime is 12012111989. The next prime is 12012112027. The reversal of 12012112001 is 10021121021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10021121021 = 2161 ⋅4637261.

It is a cyclic number.

It is not a de Polignac number, because 12012112001 - 2¹⁴ = 12012095617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12012112031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 434435 + ... + 461256.

It is an arithmetic number, because the mean of its divisors is an integer number (3003255276).

Almost surely, 2^12012112001 is an apocalyptic number.

It is an amenable number.

12012112001 is a deficient number, since it is larger than the sum of its proper divisors (909103).

12012112001 is an equidigital number, since it uses as much as digits as its factorization.

12012112001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909102.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 12012112001 its reverse (10021121021), we get a palindrome (22033233022).

The spelling of 12012112001 in words is "twelve billion, twelve million, one hundred twelve thousand, one".