12001120121121 has 8 divisors (see below), whose sum is σ = 16001509508544. Its totient is φ = 8000738740560.

The previous prime is 12001120121117. The next prime is 12001120121143. The reversal of 12001120121121 is 12112102110021.

It is a happy number.

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

It is not a de Polignac number, because 12001120121121 - 2² = 12001120121117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12001120121121.

It is not an unprimeable number, because it can be changed into a prime (12001120121101) 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, 4722420 + ... + 6804666.

It is an arithmetic number, because the mean of its divisors is an integer number (2000188688568).

Almost surely, 2^{12001120121121} is an apocalyptic number.

It is an amenable number.

12001120121121 is a deficient number, since it is larger than the sum of its proper divisors (4000389387423).

12001120121121 is a wasteful number, since it uses less digits than its factorization.

12001120121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4003431.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 12001120121121 its reverse (12112102110021), we get a palindrome (24113222231142).

The spelling of 12001120121121 in words is "twelve trillion, one billion, one hundred twenty million, one hundred twenty-one thousand, one hundred twenty-one".