12001202022121 has 8 divisors (see below), whose sum is σ = 12991337066120. Its totient is φ = 11020633500672.

The previous prime is 12001202022109. The next prime is 12001202022179. The reversal of 12001202022121 is 12122020210021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1777451570521 + 10223750451600 = 1333211^2 + 3197460^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12001202022121 - 2⁷ = 12001202021993 is a prime.

It is a super-2 number, since 2×12001202022121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12001202022095 and 12001202022104.

It is not an unprimeable number, because it can be changed into a prime (12001202622121) 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, 2391628026 + ... + 2391633043.

It is an arithmetic number, because the mean of its divisors is an integer number (1623917133265).

Almost surely, 2^{12001202022121} is an apocalyptic number.

It is an amenable number.

12001202022121 is a deficient number, since it is larger than the sum of its proper divisors (990135043999).

12001202022121 is a wasteful number, since it uses less digits than its factorization.

12001202022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4783261275.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12001202022121 its reverse (12122020210021), we get a palindrome (24123222232142).

The spelling of 12001202022121 in words is "twelve trillion, one billion, two hundred two million, twenty-two thousand, one hundred twenty-one".