20210000200121 has 16 divisors (see below), whose sum is σ = 21335424600000. Its totient is φ = 19090753862976.

The previous prime is 20210000200099. The next prime is 20210000200123. The reversal of 20210000200121 is 12100200001202.

It is a happy number.

It is not a de Polignac number, because 20210000200121 - 2¹⁸ = 20209999937977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20210000200123) 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 15 ways as a sum of consecutive naturals, for example, 308898950 + ... + 308964368.

It is an arithmetic number, because the mean of its divisors is an integer number (1333464037500).

Almost surely, 2^{20210000200121} is an apocalyptic number.

It is an amenable number.

20210000200121 is a deficient number, since it is larger than the sum of its proper divisors (1125424399879).

20210000200121 is a wasteful number, since it uses less digits than its factorization.

20210000200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112376.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20210000200121 its reverse (12100200001202), we get a palindrome (32310200201323).

The spelling of 20210000200121 in words is "twenty trillion, two hundred ten billion, two hundred thousand, one hundred twenty-one".