1100121011 has 8 divisors (see below), whose sum is σ = 1200379824. Its totient is φ = 999903520.

The previous prime is 1100121007. The next prime is 1100121041. The reversal of 1100121011 is 1101210011.

It is a happy number.

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

It is not a de Polignac number, because 1100121011 - 2² = 1100121007 is a prime.

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 1100121011.

It is not an unprimeable number, because it can be changed into a prime (1100121041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78881 + ... + 91773.

It is an arithmetic number, because the mean of its divisors is an integer number (150047478).

Almost surely, 2^1100121011 is an apocalyptic number.

1100121011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1100121011 is a deficient number, since it is larger than the sum of its proper divisors (100258813).

1100121011 is a wasteful number, since it uses less digits than its factorization.

1100121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20661.

The product of its (nonzero) digits is 2, while the sum is 8.

The square root of 1100121011 is about 33168.0721628496. The cubic root of 1100121011 is about 1032.3179677802.

Adding to 1100121011 its reverse (1101210011), we get a palindrome (2201331022).

The spelling of 1100121011 in words is "one billion, one hundred million, one hundred twenty-one thousand, eleven".