200120210002021 has 4 divisors (see below), whose sum is σ = 203400869182444. Its totient is φ = 196839550821600.

The previous prime is 200120210002003. The next prime is 200120210002039. The reversal of 200120210002021 is 120200012021002.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (200120210002003) and next prime (200120210002039).

It can be written as a sum of positive squares in 2 ways, for example, as 30467761497121 + 169652448504900 = 5519761^2 + 13025070^2 .

It is a cyclic number.

It is not a de Polignac number, because 200120210002021 - 2¹³ = 200120209993829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200120210001992 and 200120210002010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200120210009021) 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, 1640329590120 + ... + 1640329590241.

It is an arithmetic number, because the mean of its divisors is an integer number (50850217295611).

Almost surely, 2^{200120210002021} is an apocalyptic number.

It is an amenable number.

200120210002021 is a deficient number, since it is larger than the sum of its proper divisors (3280659180423).

200120210002021 is an equidigital number, since it uses as much as digits as its factorization.

200120210002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3280659180422.

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

Adding to 200120210002021 its reverse (120200012021002), we get a palindrome (320320222023023).

The spelling of 200120210002021 in words is "two hundred trillion, one hundred twenty billion, two hundred ten million, two thousand, twenty-one".