11220555511 has 8 divisors (see below), whose sum is σ = 12294061200. Its totient is φ = 10155959040.

The previous prime is 11220555461. The next prime is 11220555527. The reversal of 11220555511 is 11555502211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11220555511 - 2²⁷ = 11086337783 is a prime.

It is a super-3 number, since 3×11220555511³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11220555511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220556511) 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 7 ways as a sum of consecutive naturals, for example, 2224666 + ... + 2229703.

It is an arithmetic number, because the mean of its divisors is an integer number (1536757650).

Almost surely, 2^11220555511 is an apocalyptic number.

11220555511 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11220555511 is a deficient number, since it is larger than the sum of its proper divisors (1073505689).

11220555511 is a wasteful number, since it uses less digits than its factorization.

11220555511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4454609.

The product of its (nonzero) digits is 2500, while the sum is 28.

The spelling of 11220555511 in words is "eleven billion, two hundred twenty million, five hundred fifty-five thousand, five hundred eleven".