200221012221 has 4 divisors (see below), whose sum is σ = 266961349632. Its totient is φ = 133480674812.

The previous prime is 200221012213. The next prime is 200221012231. The reversal of 200221012221 is 122210122002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 200221012221 - 2³ = 200221012213 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 200221012221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200221012231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33370168701 + ... + 33370168706.

It is an arithmetic number, because the mean of its divisors is an integer number (66740337408).

Almost surely, 2^200221012221 is an apocalyptic number.

It is an amenable number.

200221012221 is a deficient number, since it is larger than the sum of its proper divisors (66740337411).

200221012221 is an equidigital number, since it uses as much as digits as its factorization.

200221012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66740337410.

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

Adding to 200221012221 its reverse (122210122002), we get a palindrome (322431134223).

The spelling of 200221012221 in words is "two hundred billion, two hundred twenty-one million, twelve thousand, two hundred twenty-one".