1122001220 has 12 divisors (see below), whose sum is σ = 2356202604. Its totient is φ = 448800480.

The previous prime is 1122001217. The next prime is 1122001261. The reversal of 1122001220 is 221002211.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 779973184 + 342028036 = 27928^2 + 18494^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28050011 + ... + 28050050.

It is an arithmetic number, because the mean of its divisors is an integer number (196350217).

Almost surely, 2^1122001220 is an apocalyptic number.

1122001220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1122001220 is an abundant number, since it is smaller than the sum of its proper divisors (1234201384).

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

1122001220 is a wasteful number, since it uses less digits than its factorization.

1122001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56100070 (or 56100068 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1122001220 is about 33496.2866598672. The cubic root of 1122001220 is about 1039.1169834713.

Adding to 1122001220 its reverse (221002211), we get a palindrome (1343003431).

Subtracting from 1122001220 its reverse (221002211), we obtain a palindrome (900999009).

The spelling of 1122001220 in words is "one billion, one hundred twenty-two million, one thousand, two hundred twenty".