1122321220 has 12 divisors (see below), whose sum is σ = 2356874604. Its totient is φ = 448928480.

The previous prime is 1122321217. The next prime is 1122321227. The reversal of 1122321220 is 221232211.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 266407684 + 855913536 = 16322^2 + 29256^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1122321194 and 1122321203.

It is not an unprimeable number, because it can be changed into a prime (1122321227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28058011 + ... + 28058050.

It is an arithmetic number, because the mean of its divisors is an integer number (196406217).

Almost surely, 2^1122321220 is an apocalyptic number.

1122321220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1122321220 is an abundant number, since it is smaller than the sum of its proper divisors (1234553384).

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

1122321220 is a wasteful number, since it uses less digits than its factorization.

1122321220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56116070 (or 56116068 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1122321220 is about 33501.0629682104. The cubic root of 1122321220 is about 1039.2157610906.

Adding to 1122321220 its reverse (221232211), we get a palindrome (1343553431).

The spelling of 1122321220 in words is "one billion, one hundred twenty-two million, three hundred twenty-one thousand, two hundred twenty".