204021120377 has 2 divisors, whose sum is σ = 204021120378. Its totient is φ = 204021120376.

The previous prime is 204021120337. The next prime is 204021120427. The reversal of 204021120377 is 773021120402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199330103296 + 4691017081 = 446464^2 + 68491^2 .

It is a cyclic number.

It is not a de Polignac number, because 204021120377 - 2⁶ = 204021120313 is a prime.

It is not a weakly prime, because it can be changed into another prime (204021120337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102010560188 + 102010560189.

It is an arithmetic number, because the mean of its divisors is an integer number (102010560189).

Almost surely, 2^204021120377 is an apocalyptic number.

It is an amenable number.

204021120377 is a deficient number, since it is larger than the sum of its proper divisors (1).

204021120377 is an equidigital number, since it uses as much as digits as its factorization.

204021120377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4704, while the sum is 29.

Adding to 204021120377 its reverse (773021120402), we get a palindrome (977042240779).

The spelling of 204021120377 in words is "two hundred four billion, twenty-one million, one hundred twenty thousand, three hundred seventy-seven".