200221201222121 has 8 divisors (see below), whose sum is σ = 210956314636800. Its totient is φ = 189505803353040.

The previous prime is 200221201222039. The next prime is 200221201222177. The reversal of 200221201222121 is 121222102122002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 200221201222121 - 2⁴² = 195823154711017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200221201222093 and 200221201222102.

It is not an unprimeable number, because it can be changed into a prime (200221201222621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4928865545 + ... + 4928906166.

It is an arithmetic number, because the mean of its divisors is an integer number (26369539329600).

Almost surely, 2^{200221201222121} is an apocalyptic number.

It is an amenable number.

200221201222121 is a deficient number, since it is larger than the sum of its proper divisors (10735113414679).

200221201222121 is a wasteful number, since it uses less digits than its factorization.

200221201222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9857772799.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 200221201222121 its reverse (121222102122002), we get a palindrome (321443303344123).

The spelling of 200221201222121 in words is "two hundred trillion, two hundred twenty-one billion, two hundred one million, two hundred twenty-two thousand, one hundred twenty-one".