11121243551011 has 16 divisors (see below), whose sum is σ = 12390568132608. Its totient is φ = 9894975249600.

The previous prime is 11121243551003. The next prime is 11121243551021. The reversal of 11121243551011 is 11015534212111.

It is a cyclic number.

It is not a de Polignac number, because 11121243551011 - 2³ = 11121243551003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11121243551021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72448606 + ... + 72601948.

It is an arithmetic number, because the mean of its divisors is an integer number (774410508288).

Almost surely, 2^{11121243551011} is an apocalyptic number.

11121243551011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11121243551011 is a deficient number, since it is larger than the sum of its proper divisors (1269324581597).

11121243551011 is a wasteful number, since it uses less digits than its factorization.

11121243551011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293682.

The product of its (nonzero) digits is 1200, while the sum is 28.

Adding to 11121243551011 its reverse (11015534212111), we get a palindrome (22136777763122).

The spelling of 11121243551011 in words is "eleven trillion, one hundred twenty-one billion, two hundred forty-three million, five hundred fifty-one thousand, eleven".