200120012210221 has 16 divisors (see below), whose sum is σ = 204507326590704. Its totient is φ = 195779512387584.

The previous prime is 200120012210123. The next prime is 200120012210243. The reversal of 200120012210221 is 122012210021002.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 51854199372196 + 148265812838025 = 7200986^2 + 12176445^2 .

It is a cyclic number.

It is not a de Polignac number, because 200120012210221 - 2¹¹ = 200120012208173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200120012210195 and 200120012210204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200120012210281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4283121 + ... + 20459353.

It is an arithmetic number, because the mean of its divisors is an integer number (12781707911919).

Almost surely, 2^{200120012210221} is an apocalyptic number.

It is an amenable number.

200120012210221 is a deficient number, since it is larger than the sum of its proper divisors (4387314380483).

200120012210221 is a wasteful number, since it uses less digits than its factorization.

200120012210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16177680.

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

Adding to 200120012210221 its reverse (122012210021002), we get a palindrome (322132222231223).

It can be divided in two parts, 20012001 and 2210221, that added together give a palindrome (22222222).

The spelling of 200120012210221 in words is "two hundred trillion, one hundred twenty billion, twelve million, two hundred ten thousand, two hundred twenty-one".