1126331220 has 192 divisors, whose sum is σ = 3699634176. Its totient is φ = 250736640.

The previous prime is 1126331201. The next prime is 1126331257. The reversal of 1126331220 is 221336211.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 63 ways as a sum of consecutive naturals, for example, 3190564 + ... + 3190916.

It is an arithmetic number, because the mean of its divisors is an integer number (19268928).

Almost surely, 2^1126331220 is an apocalyptic number.

1126331220 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 1126331220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1849817088).

1126331220 is an abundant number, since it is smaller than the sum of its proper divisors (2573302956).

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

1126331220 is a wasteful number, since it uses less digits than its factorization.

1126331220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550 (or 548 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1126331220 is about 33560.8584514759. The cubic root of 1126331220 is about 1040.4519793323.

Adding to 1126331220 its reverse (221336211), we get a palindrome (1347667431).

The spelling of 1126331220 in words is "one billion, one hundred twenty-six million, three hundred thirty-one thousand, two hundred twenty".