1100121120 has 144 divisors (see below), whose sum is σ = 4290511680. Its totient is φ = 251453952.

The previous prime is 1100121107. The next prime is 1100121163. The reversal of 1100121120 is 211210011.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44490 + ... + 64649.

It is an arithmetic number, because the mean of its divisors is an integer number (29795220).

Almost surely, 2^1100121120 is an apocalyptic number.

1100121120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1100121120 is an abundant number, since it is smaller than the sum of its proper divisors (3190390560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1100121120 is a wasteful number, since it uses less digits than its factorization.

1100121120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109167 (or 109156 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 1100121120 is about 33168.0738059960. The cubic root of 1100121120 is about 1032.3180018742.

Adding to 1100121120 its reverse (211210011), we get a palindrome (1311331131).

The spelling of 1100121120 in words is "one billion, one hundred million, one hundred twenty-one thousand, one hundred twenty".