1100105600561 has 4 divisors (see below), whose sum is σ = 1200115200624. Its totient is φ = 1000096000500.

The previous prime is 1100105600543. The next prime is 1100105600569. The reversal of 1100105600561 is 1650065010011.

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 1100105600561 - 2²⁶ = 1100038491697 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1100105600561.

It is not an unprimeable number, because it can be changed into a prime (1100105600569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50004800015 + ... + 50004800036.

It is an arithmetic number, because the mean of its divisors is an integer number (300028800156).

Almost surely, 2^{1100105600561} is an apocalyptic number.

1100105600561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1100105600561 is a deficient number, since it is larger than the sum of its proper divisors (100009600063).

1100105600561 is a wasteful number, since it uses less digits than its factorization.

1100105600561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100009600062.

The product of its (nonzero) digits is 900, while the sum is 26.

The spelling of 1100105600561 in words is "one trillion, one hundred billion, one hundred five million, six hundred thousand, five hundred sixty-one".