200121220211021 has 8 divisors (see below), whose sum is σ = 203247981179040. Its totient is φ = 197011498812912.

The previous prime is 200121220210991. The next prime is 200121220211053. The reversal of 200121220211021 is 120112022121002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200121220211021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200121220211621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4259868806 + ... + 4259915783.

It is an arithmetic number, because the mean of its divisors is an integer number (25405997647380).

Almost surely, 2^{200121220211021} is an apocalyptic number.

It is an amenable number.

200121220211021 is a deficient number, since it is larger than the sum of its proper divisors (3126760968019).

200121220211021 is an equidigital number, since it uses as much as digits as its factorization.

200121220211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8519784955.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 200121220211021 its reverse (120112022121002), we get a palindrome (320233242332023).

The spelling of 200121220211021 in words is "two hundred trillion, one hundred twenty-one billion, two hundred twenty million, two hundred eleven thousand, twenty-one".