1101020120 has 64 divisors (see below), whose sum is σ = 2640107520. Its totient is φ = 412280704.

The previous prime is 1101020111. The next prime is 1101020159. The reversal of 1101020120 is 210201011.

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 = 1101020098 and 1101020107.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 30509 + ... + 55971.

It is an arithmetic number, because the mean of its divisors is an integer number (41251680).

Almost surely, 2^1101020120 is an apocalyptic number.

1101020120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1101020120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1320053760).

1101020120 is an abundant number, since it is smaller than the sum of its proper divisors (1539087400).

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

1101020120 is a wasteful number, since it uses less digits than its factorization.

1101020120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25544 (or 25540 counting only the distinct ones).

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

The square root of 1101020120 is about 33181.6232273227. The cubic root of 1101020120 is about 1032.5991227996.

Adding to 1101020120 its reverse (210201011), we get a palindrome (1311221131).

The spelling of 1101020120 in words is "one billion, one hundred one million, twenty thousand, one hundred twenty".