11121212120011 has 32 divisors (see below), whose sum is σ = 13024318462848. Its totient is φ = 9300027985920.

The previous prime is 11121212120009. The next prime is 11121212120023. The reversal of 11121212120011 is 11002121212111.

It is not a de Polignac number, because 11121212120011 - 2¹ = 11121212120009 is a prime.

It is a super-2 number, since 2×11121212120011² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11121212120071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19389301 + ... + 19954633.

It is an arithmetic number, because the mean of its divisors is an integer number (407009951964).

Almost surely, 2^{11121212120011} is an apocalyptic number.

11121212120011 is a deficient number, since it is larger than the sum of its proper divisors (1903106342837).

11121212120011 is a wasteful number, since it uses less digits than its factorization.

11121212120011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565831.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 11121212120011 its reverse (11002121212111), we get a palindrome (22123333332122).

The spelling of 11121212120011 in words is "eleven trillion, one hundred twenty-one billion, two hundred twelve million, one hundred twenty thousand, eleven".