1131310220 has 96 divisors (see below), whose sum is σ = 2592995328. Its totient is φ = 412941312.

The previous prime is 1131310207. The next prime is 1131310241. The reversal of 1131310220 is 220131311.

It is a junction number, because it is equal to n+sod(n) for n = 1131310195 and 1131310204.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3260087 + ... + 3260433.

It is an arithmetic number, because the mean of its divisors is an integer number (27010368).

Almost surely, 2^1131310220 is an apocalyptic number.

1131310220 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 1131310220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1296497664).

1131310220 is an abundant number, since it is smaller than the sum of its proper divisors (1461685108).

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

1131310220 is a wasteful number, since it uses less digits than its factorization.

1131310220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639 (or 637 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1131310220 is about 33634.9553292404. The cubic root of 1131310220 is about 1041.9828480469.

Adding to 1131310220 its reverse (220131311), we get a palindrome (1351441531).

The spelling of 1131310220 in words is "one billion, one hundred thirty-one million, three hundred ten thousand, two hundred twenty".