200120320021 has 4 divisors (see below), whose sum is σ = 200167779852. Its totient is φ = 200072860192.

The previous prime is 200120320009. The next prime is 200120320067. The reversal of 200120320021 is 120023021002.

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 83575919025 + 116544400996 = 289095^2 + 341386^2 .

It is a cyclic number.

It is not a de Polignac number, because 200120320021 - 2²³ = 200111931413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200120319983 and 200120320010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200120320321) 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, 23723590 + ... + 23732023.

It is an arithmetic number, because the mean of its divisors is an integer number (50041944963).

Almost surely, 2^200120320021 is an apocalyptic number.

It is an amenable number.

200120320021 is a deficient number, since it is larger than the sum of its proper divisors (47459831).

200120320021 is an equidigital number, since it uses as much as digits as its factorization.

200120320021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47459830.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 200120320021 its reverse (120023021002), we get a palindrome (320143341023).

The spelling of 200120320021 in words is "two hundred billion, one hundred twenty million, three hundred twenty thousand, twenty-one".