200121320021323 has 4 divisors (see below), whose sum is σ = 200882237588208. Its totient is φ = 199360402454440.

The previous prime is 200121320021317. The next prime is 200121320021333. The reversal of 200121320021323 is 323120023121002.

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

It is a cyclic number.

It is not a de Polignac number, because 200121320021323 - 2¹⁷ = 200121319890251 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200121320021294 and 200121320021303.

It is not an unprimeable number, because it can be changed into a prime (200121320021303) 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, 380458783048 + ... + 380458783573.

It is an arithmetic number, because the mean of its divisors is an integer number (50220559397052).

Almost surely, 2^{200121320021323} is an apocalyptic number.

200121320021323 is a deficient number, since it is larger than the sum of its proper divisors (760917566885).

200121320021323 is an equidigital number, since it uses as much as digits as its factorization.

200121320021323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760917566884.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 200121320021323 its reverse (323120023121002), we get a palindrome (523241343142325).

The spelling of 200121320021323 in words is "two hundred trillion, one hundred twenty-one billion, three hundred twenty million, twenty-one thousand, three hundred twenty-three".