1101200120 has 32 divisors (see below), whose sum is σ = 2480770800. Its totient is φ = 439934208.

The previous prime is 1101200101. The next prime is 1101200123. The reversal of 1101200120 is 210021011.

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 = 1101200098 and 1101200107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101200123) 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, 16436 + ... + 49724.

Almost surely, 2^1101200120 is an apocalyptic number.

1101200120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1101200120 is an abundant number, since it is smaller than the sum of its proper divisors (1379570680).

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

1101200120 is a wasteful number, since it uses less digits than its factorization.

1101200120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34127 (or 34123 counting only the distinct ones).

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

The square root of 1101200120 is about 33184.3354611781. The cubic root of 1101200120 is about 1032.6553911368.

Adding to 1101200120 its reverse (210021011), we get a palindrome (1311221131).

The spelling of 1101200120 in words is "one billion, one hundred one million, two hundred thousand, one hundred twenty".