2121302110121 has 8 divisors (see below), whose sum is σ = 2213549165184. Its totient is φ = 2029056432480.

The previous prime is 2121302110117. The next prime is 2121302110129. The reversal of 2121302110121 is 1210112031212.

It is a happy number.

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 2121302110121 - 2² = 2121302110117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2121302110121.

It is not an unprimeable number, because it can be changed into a prime (2121302110129) 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, 3933620 + ... + 4440266.

It is an arithmetic number, because the mean of its divisors is an integer number (276693645648).

Almost surely, 2^{2121302110121} is an apocalyptic number.

It is an amenable number.

2121302110121 is a deficient number, since it is larger than the sum of its proper divisors (92247055063).

2121302110121 is a wasteful number, since it uses less digits than its factorization.

2121302110121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688711.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 2121302110121 its reverse (1210112031212), we get a palindrome (3331414141333).

The spelling of 2121302110121 in words is "two trillion, one hundred twenty-one billion, three hundred two million, one hundred ten thousand, one hundred twenty-one".