1221043214 has 8 divisors (see below), whose sum is σ = 1838862648. Its totient is φ = 608089000.

The previous prime is 1221043193. The next prime is 1221043217. The reversal of 1221043214 is 4123401221.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221043217) 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 3 ways as a sum of consecutive naturals, for example, 1215677 + ... + 1216680.

It is an arithmetic number, because the mean of its divisors is an integer number (229857831).

Almost surely, 2^1221043214 is an apocalyptic number.

1221043214 is a deficient number, since it is larger than the sum of its proper divisors (617819434).

1221043214 is a wasteful number, since it uses less digits than its factorization.

1221043214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2432610.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1221043214 is about 34943.4287670801. The cubic root of 1221043214 is about 1068.8342076350.

Adding to 1221043214 its reverse (4123401221), we get a palindrome (5344444435).

The spelling of 1221043214 in words is "one billion, two hundred twenty-one million, forty-three thousand, two hundred fourteen".