200020210102021 has 4 divisors (see below), whose sum is σ = 200021388878700. Its totient is φ = 200019031325344.

The previous prime is 200020210101983. The next prime is 200020210102057. The reversal of 200020210102021 is 120201012020002.

It is a happy number.

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 54495193711396 + 145525016390625 = 7382086^2 + 12063375^2 .

It is a cyclic number.

It is not a de Polignac number, because 200020210102021 - 2¹³ = 200020210093829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200020210101992 and 200020210102010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200020210132021) 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, 589133776 + ... + 589473193.

It is an arithmetic number, because the mean of its divisors is an integer number (50005347219675).

Almost surely, 2^{200020210102021} is an apocalyptic number.

It is an amenable number.

200020210102021 is a deficient number, since it is larger than the sum of its proper divisors (1178776679).

200020210102021 is a wasteful number, since it uses less digits than its factorization.

200020210102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1178776678.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 200020210102021 its reverse (120201012020002), we get a palindrome (320221222122023).

The spelling of 200020210102021 in words is "two hundred trillion, twenty billion, two hundred ten million, one hundred two thousand, twenty-one".