200111299778581 has 2 divisors, whose sum is σ = 200111299778582. Its totient is φ = 200111299778580.

The previous prime is 200111299778569. The next prime is 200111299778693. The reversal of 200111299778581 is 185877992111002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 168050621072356 + 32060678706225 = 12963434^2 + 5662215^2 .

It is a cyclic number.

It is not a de Polignac number, because 200111299778581 - 2³³ = 200102709843989 is a prime.

It is a super-2 number, since 2×200111299778581² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200111299778561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100055649889290 + 100055649889291.

It is an arithmetic number, because the mean of its divisors is an integer number (100055649889291).

Almost surely, 2^{200111299778581} is an apocalyptic number.

It is an amenable number.

200111299778581 is a deficient number, since it is larger than the sum of its proper divisors (1).

200111299778581 is an equidigital number, since it uses as much as digits as its factorization.

200111299778581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5080320, while the sum is 61.

The spelling of 200111299778581 in words is "two hundred trillion, one hundred eleven billion, two hundred ninety-nine million, seven hundred seventy-eight thousand, five hundred eighty-one".