200102221012021 has 4 divisors (see below), whose sum is σ = 200102364476044. Its totient is φ = 200102077548000.

The previous prime is 200102221012013. The next prime is 200102221012073. The reversal of 200102221012021 is 120210122201002.

It is a happy number.

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 140901291934225 + 59200929077796 = 11870185^2 + 7694214^2 .

It is a cyclic number.

It is not a de Polignac number, because 200102221012021 - 2³ = 200102221012013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200102221011986 and 200102221012004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200102221012081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69619080 + ... + 72436321.

It is an arithmetic number, because the mean of its divisors is an integer number (50025591119011).

Almost surely, 2^{200102221012021} is an apocalyptic number.

It is an amenable number.

200102221012021 is a deficient number, since it is larger than the sum of its proper divisors (143464023).

200102221012021 is a wasteful number, since it uses less digits than its factorization.

200102221012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143464022.

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

Adding to 200102221012021 its reverse (120210122201002), we get a palindrome (320312343213023).

The spelling of 200102221012021 in words is "two hundred trillion, one hundred two billion, two hundred twenty-one million, twelve thousand, twenty-one".