200121220222021 has 16 divisors (see below), whose sum is σ = 240749628163200. Its totient is φ = 162502899997248.

The previous prime is 200121220222019. The next prime is 200121220222201. The reversal of 200121220222021 is 120222022121002.

It is a cyclic number.

It is not a de Polignac number, because 200121220222021 - 2¹ = 200121220222019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 200121220222021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200121220225021) 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, 6931035 + ... + 21172663.

It is an arithmetic number, because the mean of its divisors is an integer number (15046851760200).

Almost surely, 2^{200121220222021} is an apocalyptic number.

It is an amenable number.

200121220222021 is a deficient number, since it is larger than the sum of its proper divisors (40628407941179).

200121220222021 is a wasteful number, since it uses less digits than its factorization.

200121220222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14347308.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 200121220222021 its reverse (120222022121002), we get a palindrome (320343242343023).

The spelling of 200121220222021 in words is "two hundred trillion, one hundred twenty-one billion, two hundred twenty million, two hundred twenty-two thousand, twenty-one".