1113555225521 has 4 divisors (see below), whose sum is σ = 1113570627312. Its totient is φ = 1113539823732.

The previous prime is 1113555225499. The next prime is 1113555225529. The reversal of 1113555225521 is 1255225553111.

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 1113555225521 - 2⁶ = 1113555225457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1113555225529) 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, 7591931 + ... + 7737216.

It is an arithmetic number, because the mean of its divisors is an integer number (278392656828).

Almost surely, 2^{1113555225521} is an apocalyptic number.

It is an amenable number.

1113555225521 is a deficient number, since it is larger than the sum of its proper divisors (15401791).

1113555225521 is an equidigital number, since it uses as much as digits as its factorization.

1113555225521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15401790.

The product of its digits is 75000, while the sum is 38.

The spelling of 1113555225521 in words is "one trillion, one hundred thirteen billion, five hundred fifty-five million, two hundred twenty-five thousand, five hundred twenty-one".