111212105918647 has 2 divisors, whose sum is σ = 111212105918648. Its totient is φ = 111212105918646.

The previous prime is 111212105918593. The next prime is 111212105918681. The reversal of 111212105918647 is 746819501212111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111212105918647 - 2⁷ = 111212105918519 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111212105918647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111212105918047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55606052959323 + 55606052959324.

It is an arithmetic number, because the mean of its divisors is an integer number (55606052959324).

Almost surely, 2^{111212105918647} is an apocalyptic number.

111212105918647 is a deficient number, since it is larger than the sum of its proper divisors (1).

111212105918647 is an equidigital number, since it uses as much as digits as its factorization.

111212105918647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 49.

The spelling of 111212105918647 in words is "one hundred eleven trillion, two hundred twelve billion, one hundred five million, nine hundred eighteen thousand, six hundred forty-seven".