1110000505561 has 4 divisors (see below), whose sum is σ = 1123374005712. Its totient is φ = 1096627005412.

The previous prime is 1110000505553. The next prime is 1110000505573. The reversal of 1110000505561 is 1655050000111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1110000505561 - 2³ = 1110000505553 is a prime.

It is a super-2 number, since 2×1110000505561² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1110000505591) 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 in 3 ways as a sum of consecutive naturals, for example, 6686749951 + ... + 6686750116.

It is an arithmetic number, because the mean of its divisors is an integer number (280843501428).

Almost surely, 2^{1110000505561} is an apocalyptic number.

It is an amenable number.

1110000505561 is a deficient number, since it is larger than the sum of its proper divisors (13373500151).

1110000505561 is an equidigital number, since it uses as much as digits as its factorization.

1110000505561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13373500150.

The product of its (nonzero) digits is 750, while the sum is 25.

Adding to 1110000505561 its reverse (1655050000111), we get a palindrome (2765050505672).

The spelling of 1110000505561 in words is "one trillion, one hundred ten billion, five hundred five thousand, five hundred sixty-one".