200021201021 has 8 divisors (see below), whose sum is σ = 200419704120. Its totient is φ = 199622863872.

The previous prime is 200021200987. The next prime is 200021201047. The reversal of 200021201021 is 120102120002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 20839225 + 200000361796 = 4565^2 + 447214^2 .

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-200021201021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200021200993 and 200021201011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200021201071) 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, 2528951 + ... + 2606843.

It is an arithmetic number, because the mean of its divisors is an integer number (25052463015).

Almost surely, 2^200021201021 is an apocalyptic number.

It is an amenable number.

200021201021 is a deficient number, since it is larger than the sum of its proper divisors (398503099).

200021201021 is an equidigital number, since it uses as much as digits as its factorization.

200021201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82975.

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

Adding to 200021201021 its reverse (120102120002), we get a palindrome (320123321023).

It can be divided in two parts, 20002 and 1201021, that multiplied together give a palindrome (24022822042).

The spelling of 200021201021 in words is "two hundred billion, twenty-one million, two hundred one thousand, twenty-one".