1221243414 has 8 divisors (see below), whose sum is σ = 2442486840. Its totient is φ = 407081136.

The previous prime is 1221243391. The next prime is 1221243427. The reversal of 1221243414 is 4143421221.

It is a sphenic number, since it is the product of 3 distinct primes.

1221243414 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 101770279 + ... + 101770290.

It is an arithmetic number, because the mean of its divisors is an integer number (305310855).

Almost surely, 2^1221243414 is an apocalyptic number.

1221243414 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.

1221243414 is a wasteful number, since it uses less digits than its factorization.

1221243414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203540574.

The product of its digits is 1536, while the sum is 24.

The square root of 1221243414 is about 34946.2932798316. The cubic root of 1221243414 is about 1068.8926191398.

Adding to 1221243414 its reverse (4143421221), we get a palindrome (5364664635).

The spelling of 1221243414 in words is "one billion, two hundred twenty-one million, two hundred forty-three thousand, four hundred fourteen".