Adding to 1221074418 its reverse (8144701221), we get a palindrome (9365775639).
It is a sphenic number, since it is the product of 3 distinct primes.
1221074418 is an admirable number.
It is a Leyland number of the form 135 + 513.
Almost surely, 21221074418 is an apocalyptic number.
1221074418 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1221074418 is a wasteful number, since it uses less digits than its factorization.
1221074418 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 203512408.
The square root of 1221074418 is about 34943.8752573323. The cubic root of 1221074418 is about 1068.8433123137.
The spelling of 1221074418 in words is "one billion, two hundred twenty-one million, seventy-four thousand, four hundred eighteen".