111221321300081 has 2 divisors, whose sum is σ = 111221321300082. Its totient is φ = 111221321300080.

The previous prime is 111221321300069. The next prime is 111221321300129. The reversal of 111221321300081 is 180003123122111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63463767952225 + 47757553347856 = 7966415^2 + 6910684^2 .

It is a cyclic number.

It is not a de Polignac number, because 111221321300081 - 2¹⁰ = 111221321299057 is a prime.

It is a super-2 number, since 2×111221321300081² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 111221321300081.

It is not a weakly prime, because it can be changed into another prime (111221321300281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55610660650040 + 55610660650041.

It is an arithmetic number, because the mean of its divisors is an integer number (55610660650041).

Almost surely, 2^{111221321300081} is an apocalyptic number.

It is an amenable number.

111221321300081 is a deficient number, since it is larger than the sum of its proper divisors (1).

111221321300081 is an equidigital number, since it uses as much as digits as its factorization.

111221321300081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 26.

Adding to 111221321300081 its reverse (180003123122111), we get a palindrome (291224444422192).

The spelling of 111221321300081 in words is "one hundred eleven trillion, two hundred twenty-one billion, three hundred twenty-one million, three hundred thousand, eighty-one".