1201228818 has 16 divisors (see below), whose sum is σ = 2412512640. Its totient is φ = 398733776.

The previous prime is 1201228813. The next prime is 1201228841. The reversal of 1201228818 is 8188221021.

It is not an unprimeable number, because it can be changed into a prime (1201228813) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 417405 + ... + 420272.

It is an arithmetic number, because the mean of its divisors is an integer number (150782040).

Almost surely, 2^1201228818 is an apocalyptic number.

1201228818 is an abundant number, since it is smaller than the sum of its proper divisors (1211283822).

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

1201228818 is a wasteful number, since it uses less digits than its factorization.

1201228818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837921.

The product of its (nonzero) digits is 4096, while the sum is 33.

The square root of 1201228818 is about 34658.7480731777. The cubic root of 1201228818 is about 1063.0211715456.

Adding to 1201228818 its reverse (8188221021), we get a palindrome (9389449839).

The spelling of 1201228818 in words is "one billion, two hundred one million, two hundred twenty-eight thousand, eight hundred eighteen".