200021102021 has 16 divisors (see below), whose sum is σ = 219503484144. Its totient is φ = 181124895744.

The previous prime is 200021101997. The next prime is 200021102023. The reversal of 200021102021 is 120201120002.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 14307508996 + 185713593025 = 119614^2 + 430945^2 .

It is a de Polignac number, because none of the positive numbers 2^k-200021102021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200021101993 and 200021102011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200021102023) 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, 5961725 + ... + 5995181.

It is an arithmetic number, because the mean of its divisors is an integer number (13718967759).

Almost surely, 2^200021102021 is an apocalyptic number.

It is an amenable number.

200021102021 is a deficient number, since it is larger than the sum of its proper divisors (19482382123).

200021102021 is a wasteful number, since it uses less digits than its factorization.

200021102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42200.

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

Adding to 200021102021 its reverse (120201120002), we get a palindrome (320222222023).

The spelling of 200021102021 in words is "two hundred billion, twenty-one million, one hundred two thousand, twenty-one".