1011011320 has 64 divisors (see below), whose sum is σ = 2496614400. Its totient is φ = 365412480.

The previous prime is 1011011303. The next prime is 1011011321. The reversal of 1011011320 is 231101101.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1011011297 and 1011011306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011011321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66601 + ... + 80359.

It is an arithmetic number, because the mean of its divisors is an integer number (39009600).

Almost surely, 2^1011011320 is an apocalyptic number.

1011011320 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 1011011320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1248307200).

1011011320 is an abundant number, since it is smaller than the sum of its proper divisors (1485603080).

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

1011011320 is a wasteful number, since it uses less digits than its factorization.

1011011320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13948 (or 13944 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 10.

The square root of 1011011320 is about 31796.4041992172. The cubic root of 1011011320 is about 1003.6570496845.

Adding to 1011011320 its reverse (231101101), we get a palindrome (1242112421).

The spelling of 1011011320 in words is "one billion, eleven million, eleven thousand, three hundred twenty".