200221001021 has 4 divisors (see below), whose sum is σ = 207125173500. Its totient is φ = 193316828544.

The previous prime is 200221000979. The next prime is 200221001027. The reversal of 200221001021 is 120100122002.

It is a happy number.

200221001021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 146899725625 + 53321275396 = 383275^2 + 230914^2 .

It is not a de Polignac number, because 200221001021 - 2¹⁰ = 200220999997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200221000993 and 200221001011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200221001027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3452086196 + ... + 3452086253.

It is an arithmetic number, because the mean of its divisors is an integer number (51781293375).

Almost surely, 2^200221001021 is an apocalyptic number.

It is an amenable number.

200221001021 is a deficient number, since it is larger than the sum of its proper divisors (6904172479).

200221001021 is an equidigital number, since it uses as much as digits as its factorization.

200221001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6904172478.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 200221001021 its reverse (120100122002), we get a palindrome (320321123023).

The spelling of 200221001021 in words is "two hundred billion, two hundred twenty-one million, one thousand, twenty-one".