111212216025697 has 2 divisors, whose sum is σ = 111212216025698. Its totient is φ = 111212216025696.

The previous prime is 111212216025679. The next prime is 111212216025733. The reversal of 111212216025697 is 796520612212111.

Together with previous prime (111212216025679) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107542064322001 + 3670151703696 = 10370249^2 + 1915764^2 .

It is a cyclic number.

It is not a de Polignac number, because 111212216025697 - 2²⁷ = 111212081807969 is a prime.

It is not a weakly prime, because it can be changed into another prime (111212216025637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55606108012848 + 55606108012849.

It is an arithmetic number, because the mean of its divisors is an integer number (55606108012849).

Almost surely, 2^{111212216025697} is an apocalyptic number.

It is an amenable number.

111212216025697 is a deficient number, since it is larger than the sum of its proper divisors (1).

111212216025697 is an equidigital number, since it uses as much as digits as its factorization.

111212216025697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 46.

The spelling of 111212216025697 in words is "one hundred eleven trillion, two hundred twelve billion, two hundred sixteen million, twenty-five thousand, six hundred ninety-seven".