11125565601 has 4 divisors (see below), whose sum is σ = 14834087472. Its totient is φ = 7417043732.

The previous prime is 11125565593. The next prime is 11125565609. The reversal of 11125565601 is 10656552111.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10656552111 = 3 ⋅3552184037.

It is an interprime number because it is at equal distance from previous prime (11125565593) and next prime (11125565609).

It is a cyclic number.

It is not a de Polignac number, because 11125565601 - 2³ = 11125565593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11125565609) 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, 1854260931 + ... + 1854260936.

It is an arithmetic number, because the mean of its divisors is an integer number (3708521868).

Almost surely, 2^11125565601 is an apocalyptic number.

It is an amenable number.

11125565601 is a deficient number, since it is larger than the sum of its proper divisors (3708521871).

11125565601 is an equidigital number, since it uses as much as digits as its factorization.

11125565601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3708521870.

The product of its (nonzero) digits is 9000, while the sum is 33.

The spelling of 11125565601 in words is "eleven billion, one hundred twenty-five million, five hundred sixty-five thousand, six hundred one".