200021123243 has 2 divisors, whose sum is σ = 200021123244. Its totient is φ = 200021123242.

The previous prime is 200021123171. The next prime is 200021123257. The reversal of 200021123243 is 342321120002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 200021123243 - 2¹⁰ = 200021122219 is a prime.

It is not a weakly prime, because it can be changed into another prime (200021123273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100010561621 + 100010561622.

It is an arithmetic number, because the mean of its divisors is an integer number (100010561622).

Almost surely, 2^200021123243 is an apocalyptic number.

200021123243 is a deficient number, since it is larger than the sum of its proper divisors (1).

200021123243 is an equidigital number, since it uses as much as digits as its factorization.

200021123243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 200021123243 its reverse (342321120002), we get a palindrome (542342243245).

The spelling of 200021123243 in words is "two hundred billion, twenty-one million, one hundred twenty-three thousand, two hundred forty-three".