111281209553 has 2 divisors, whose sum is σ = 111281209554. Its totient is φ = 111281209552.

The previous prime is 111281209537. The next prime is 111281209577. The reversal of 111281209553 is 355902182111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110558245009 + 722964544 = 332503^2 + 26888^2 .

It is a cyclic number.

It is not a de Polignac number, because 111281209553 - 2⁴ = 111281209537 is a prime.

It is not a weakly prime, because it can be changed into another prime (111281200553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55640604776 + 55640604777.

It is an arithmetic number, because the mean of its divisors is an integer number (55640604777).

Almost surely, 2^111281209553 is an apocalyptic number.

It is an amenable number.

111281209553 is a deficient number, since it is larger than the sum of its proper divisors (1).

111281209553 is an equidigital number, since it uses as much as digits as its factorization.

111281209553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 38.

The spelling of 111281209553 in words is "one hundred eleven billion, two hundred eighty-one million, two hundred nine thousand, five hundred fifty-three".