12002120001 has 20 divisors (see below), whose sum is σ = 17935411824. Its totient is φ = 7998593400.

The previous prime is 12002119979. The next prime is 12002120023. The reversal of 12002120001 is 10002120021.

It is an interprime number because it is at equal distance from previous prime (12002119979) and next prime (12002120023).

It is not a de Polignac number, because 12002120001 - 2¹⁰ = 12002118977 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12002120041) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 219286 + ... + 268496.

Almost surely, 2^12002120001 is an apocalyptic number.

It is an amenable number.

12002120001 is a deficient number, since it is larger than the sum of its proper divisors (5933291823).

12002120001 is an equidigital number, since it uses as much as digits as its factorization.

12002120001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52234 (or 52225 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 12002120001 its reverse (10002120021), we get a palindrome (22004240022).

The spelling of 12002120001 in words is "twelve billion, two million, one hundred twenty thousand, one".