11205551011 has 4 divisors (see below), whose sum is σ = 11205880192. Its totient is φ = 11205221832.

The previous prime is 11205550981. The next prime is 11205551041. The reversal of 11205551011 is 11015550211.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (11205550981) and next prime (11205551041).

It is a cyclic number.

It is not a de Polignac number, because 11205551011 - 2³¹ = 9058067363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11205551041) 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, 106755 + ... + 183868.

It is an arithmetic number, because the mean of its divisors is an integer number (2801470048).

Almost surely, 2^11205551011 is an apocalyptic number.

11205551011 is a deficient number, since it is larger than the sum of its proper divisors (329181).

11205551011 is an equidigital number, since it uses as much as digits as its factorization.

11205551011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329180.

The product of its (nonzero) digits is 250, while the sum is 22.

The spelling of 11205551011 in words is "eleven billion, two hundred five million, five hundred fifty-one thousand, eleven".