111204655605551 has 2 divisors, whose sum is σ = 111204655605552. Its totient is φ = 111204655605550.

The previous prime is 111204655605541. The next prime is 111204655605619. The reversal of 111204655605551 is 155506556402111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111204655605551 - 2¹⁰ = 111204655604527 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111204655605496 and 111204655605505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111204655605541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55602327802775 + 55602327802776.

It is an arithmetic number, because the mean of its divisors is an integer number (55602327802776).

Almost surely, 2^{111204655605551} is an apocalyptic number.

111204655605551 is a deficient number, since it is larger than the sum of its proper divisors (1).

111204655605551 is an equidigital number, since it uses as much as digits as its factorization.

111204655605551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900000, while the sum is 47.

The spelling of 111204655605551 in words is "one hundred eleven trillion, two hundred four billion, six hundred fifty-five million, six hundred five thousand, five hundred fifty-one".