200121220221 has 8 divisors (see below), whose sum is σ = 287353547040. Its totient is φ = 123151520112.

The previous prime is 200121220193. The next prime is 200121220231. The reversal of 200121220221 is 122022121002.

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

It is not a de Polignac number, because 200121220221 - 2¹³ = 200121212029 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 200121220221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200121220231) 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, 2565656631 + ... + 2565656708.

It is an arithmetic number, because the mean of its divisors is an integer number (35919193380).

Almost surely, 2^200121220221 is an apocalyptic number.

It is an amenable number.

200121220221 is a deficient number, since it is larger than the sum of its proper divisors (87232326819).

200121220221 is a wasteful number, since it uses less digits than its factorization.

200121220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5131313355.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 200121220221 its reverse (122022121002), we get a palindrome (322143341223).

The spelling of 200121220221 in words is "two hundred billion, one hundred twenty-one million, two hundred twenty thousand, two hundred twenty-one".