20002200000121 has 4 divisors (see below), whose sum is σ = 20014693568244. Its totient is φ = 19989706432000.

The previous prime is 20002200000073. The next prime is 20002200000143. The reversal of 20002200000121 is 12100000220002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17810130242025 + 2192069758096 = 4220205^2 + 1480564^2 .

It is a cyclic number.

It is not a de Polignac number, because 20002200000121 - 2¹¹ = 20002199998073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20002200000098 and 20002200000107.

It is not an unprimeable number, because it can be changed into a prime (20002200000191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6246781660 + ... + 6246784861.

It is an arithmetic number, because the mean of its divisors is an integer number (5003673392061).

Almost surely, 2^{20002200000121} is an apocalyptic number.

It is an amenable number.

20002200000121 is a deficient number, since it is larger than the sum of its proper divisors (12493568123).

20002200000121 is a wasteful number, since it uses less digits than its factorization.

20002200000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12493568122.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20002200000121 its reverse (12100000220002), we get a palindrome (32102200220123).

The spelling of 20002200000121 in words is "twenty trillion, two billion, two hundred million, one hundred twenty-one", and thus it is an aban number.