1115055561001 has 4 divisors (see below), whose sum is σ = 1116789707152. Its totient is φ = 1113321414852.

The previous prime is 1115055560959. The next prime is 1115055561073. The reversal of 1115055561001 is 1001655505111.

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 1115055561001 - 2²⁵ = 1115022006569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1115055561091) 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, 867072111 + ... + 867073396.

It is an arithmetic number, because the mean of its divisors is an integer number (279197426788).

Almost surely, 2^{1115055561001} is an apocalyptic number.

It is an amenable number.

1115055561001 is a deficient number, since it is larger than the sum of its proper divisors (1734146151).

1115055561001 is an equidigital number, since it uses as much as digits as its factorization.

1115055561001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1734146150.

The product of its (nonzero) digits is 3750, while the sum is 31.

The spelling of 1115055561001 in words is "one trillion, one hundred fifteen billion, fifty-five million, five hundred sixty-one thousand, one".