11005555011 has 16 divisors (see below), whose sum is σ = 16398523008. Its totient is φ = 6507348800.

The previous prime is 11005554983. The next prime is 11005555049. The reversal of 11005555011 is 11055550011.

It is a cyclic number.

It is not a de Polignac number, because 11005555011 - 2⁹ = 11005554499 is a prime.

It is a super-2 number, since 2×11005555011² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11005555091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4065741 + ... + 4068446.

It is an arithmetic number, because the mean of its divisors is an integer number (1024907688).

Almost surely, 2^11005555011 is an apocalyptic number.

11005555011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11005555011 is a deficient number, since it is larger than the sum of its proper divisors (5392967997).

11005555011 is a wasteful number, since it uses less digits than its factorization.

11005555011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8134242.

The product of its (nonzero) digits is 625, while the sum is 24.

Subtracting 11005555011 from its reverse (11055550011), we obtain a triangular number (49995000 = T₉₉₉₉).

It can be divided in two parts, 1100 and 5555011, that added together give a triangular number (5556111 = T₃₃₃₃).

The spelling of 11005555011 in words is "eleven billion, five million, five hundred fifty-five thousand, eleven".