12002120121 has 8 divisors (see below), whose sum is σ = 16048681600. Its totient is φ = 7978486032.

The previous prime is 12002120111. The next prime is 12002120167. The reversal of 12002120121 is 12102120021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12002120121 - 2⁶ = 12002120057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12002120097 and 12002120106.

It is not an unprimeable number, because it can be changed into a prime (12002120111) 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, 5730625 + ... + 5732718.

It is an arithmetic number, because the mean of its divisors is an integer number (2006085200).

Almost surely, 2^12002120121 is an apocalyptic number.

It is an amenable number.

12002120121 is a deficient number, since it is larger than the sum of its proper divisors (4046561479).

12002120121 is a wasteful number, since it uses less digits than its factorization.

12002120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11463695.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12002120121 its reverse (12102120021), we get a palindrome (24104240142).

The spelling of 12002120121 in words is "twelve billion, two million, one hundred twenty thousand, one hundred twenty-one".