1011201120 has 144 divisors (see below), whose sum is σ = 3544173360. Its totient is φ = 262351872.

The previous prime is 1011201119. The next prime is 1011201143. The reversal of 1011201120 is 211021101.

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 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 23 ways as a sum of consecutive naturals, for example, 43791 + ... + 62769.

It is an arithmetic number, because the mean of its divisors is an integer number (24612315).

Almost surely, 2^1011201120 is an apocalyptic number.

1011201120 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 1011201120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1772086680).

1011201120 is an abundant number, since it is smaller than the sum of its proper divisors (2532972240).

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

1011201120 is a wasteful number, since it uses less digits than its factorization.

1011201120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19037 (or 19026 counting only the distinct ones).

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

The square root of 1011201120 is about 31799.3886733692. The cubic root of 1011201120 is about 1003.7198522086.

Adding to 1011201120 its reverse (211021101), we get a palindrome (1222222221).

The spelling of 1011201120 in words is "one billion, eleven million, two hundred one thousand, one hundred twenty".