200111299778561 has 2 divisors, whose sum is σ = 200111299778562. Its totient is φ = 200111299778560.

The previous prime is 200111299778519. The next prime is 200111299778569. The reversal of 200111299778561 is 165877992111002.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199202709538561 + 908590240000 = 14113919^2 + 953200^2 .

It is a cyclic number.

It is not a de Polignac number, because 200111299778561 - 2⁶ = 200111299778497 is a prime.

It is a super-3 number, since 3×200111299778561³ (a number of 44 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 200111299778561.

It is not a weakly prime, because it can be changed into another prime (200111299778569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100055649889280 + 100055649889281.

It is an arithmetic number, because the mean of its divisors is an integer number (100055649889281).

Almost surely, 2^{200111299778561} is an apocalyptic number.

It is an amenable number.

200111299778561 is a deficient number, since it is larger than the sum of its proper divisors (1).

200111299778561 is an equidigital number, since it uses as much as digits as its factorization.

200111299778561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3810240, while the sum is 59.

The spelling of 200111299778561 in words is "two hundred trillion, one hundred eleven billion, two hundred ninety-nine million, seven hundred seventy-eight thousand, five hundred sixty-one".