11121121011 has 48 divisors (see below), whose sum is σ = 20060026112. Its totient is φ = 5332789440.

The previous prime is 11121121007. The next prime is 11121121019. The reversal of 11121121011 is 11012112111.

It is not a de Polignac number, because 11121121011 - 2² = 11121121007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11121121019) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 135301 + ... + 201366.

Almost surely, 2^11121121011 is an apocalyptic number.

11121121011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11121121011 is a deficient number, since it is larger than the sum of its proper divisors (8938905101).

11121121011 is a wasteful number, since it uses less digits than its factorization.

11121121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336712 (or 336701 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 11121121011 its reverse (11012112111), we get a palindrome (22133233122).

The spelling of 11121121011 in words is "eleven billion, one hundred twenty-one million, one hundred twenty-one thousand, eleven".