111382205622581 has 2 divisors, whose sum is σ = 111382205622582. Its totient is φ = 111382205622580.

The previous prime is 111382205622553. The next prime is 111382205622619. The reversal of 111382205622581 is 185226502283111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60437656995556 + 50944548627025 = 7774166^2 + 7137545^2 .

It is a cyclic number.

It is not a de Polignac number, because 111382205622581 - 2⁶ = 111382205622517 is a prime.

It is a super-2 number, since 2×111382205622581² (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 (111382205622481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55691102811290 + 55691102811291.

It is an arithmetic number, because the mean of its divisors is an integer number (55691102811291).

Almost surely, 2^{111382205622581} is an apocalyptic number.

It is an amenable number.

111382205622581 is a deficient number, since it is larger than the sum of its proper divisors (1).

111382205622581 is an equidigital number, since it uses as much as digits as its factorization.

111382205622581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 460800, while the sum is 47.

The spelling of 111382205622581 in words is "one hundred eleven trillion, three hundred eighty-two billion, two hundred five million, six hundred twenty-two thousand, five hundred eighty-one".