1100120120 has 32 divisors (see below), whose sum is σ = 2700295920. Its totient is φ = 400043520.

The previous prime is 1100120113. The next prime is 1100120129. The reversal of 1100120120 is 210210011.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a junction number, because it is equal to n+sod(n) for n = 1100120098 and 1100120107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100120129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1249697 + ... + 1250576.

Almost surely, 2^1100120120 is an apocalyptic number.

1100120120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1100120120 is an abundant number, since it is smaller than the sum of its proper divisors (1600175800).

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

1100120120 is a wasteful number, since it uses less digits than its factorization.

1100120120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2500295 (or 2500291 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1100120120 is about 33168.0587312553. The cubic root of 1100120120 is about 1032.3176890849.

Adding to 1100120120 its reverse (210210011), we get a palindrome (1310330131).

The spelling of 1100120120 in words is "one billion, one hundred million, one hundred twenty thousand, one hundred twenty".