1121202220 has 12 divisors (see below), whose sum is σ = 2354524704. Its totient is φ = 448480880.

The previous prime is 1121202151. The next prime is 1121202223. The reversal of 1121202220 is 222021211.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1121202220.

It is not an unprimeable number, because it can be changed into a prime (1121202223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28030036 + ... + 28030075.

It is an arithmetic number, because the mean of its divisors is an integer number (196210392).

Almost surely, 2^1121202220 is an apocalyptic number.

1121202220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121202220 is an abundant number, since it is smaller than the sum of its proper divisors (1233322484).

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

1121202220 is a wasteful number, since it uses less digits than its factorization.

1121202220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56060120 (or 56060118 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1121202220 is about 33484.3578406396. The cubic root of 1121202220 is about 1038.8702660842.

Adding to 1121202220 its reverse (222021211), we get a palindrome (1343223431).

The spelling of 1121202220 in words is "one billion, one hundred twenty-one million, two hundred two thousand, two hundred twenty".