12120012001001 has 4 divisors (see below), whose sum is σ = 12348691472772. Its totient is φ = 11891332529232.

The previous prime is 12120012000977. The next prime is 12120012001007. The reversal of 12120012001001 is 10010021002121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4996856683225 + 7123155317776 = 2235365^2 + 2668924^2 .

It is a cyclic number.

It is not a de Polignac number, because 12120012001001 - 2³⁰ = 12118938259177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12120012001007) 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, 114339735806 + ... + 114339735911.

It is an arithmetic number, because the mean of its divisors is an integer number (3087172868193).

Almost surely, 2^{12120012001001} is an apocalyptic number.

It is an amenable number.

12120012001001 is a deficient number, since it is larger than the sum of its proper divisors (228679471771).

12120012001001 is an equidigital number, since it uses as much as digits as its factorization.

12120012001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228679471770.

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

Adding to 12120012001001 its reverse (10010021002121), we get a palindrome (22130033003122).

The spelling of 12120012001001 in words is "twelve trillion, one hundred twenty billion, twelve million, one thousand, one".