1221320014 has 8 divisors (see below), whose sum is σ = 1837871568. Its totient is φ = 608696160.

The previous prime is 1221319999. The next prime is 1221320021. The reversal of 1221320014 is 4100231221.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1221320014.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 981147 + ... + 982390.

It is an arithmetic number, because the mean of its divisors is an integer number (229733946).

Almost surely, 2^1221320014 is an apocalyptic number.

1221320014 is a deficient number, since it is larger than the sum of its proper divisors (616551554).

1221320014 is a wasteful number, since it uses less digits than its factorization.

1221320014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1963850.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1221320014 is about 34947.3892300984. The cubic root of 1221320014 is about 1068.9149667084.

Adding to 1221320014 its reverse (4100231221), we get a palindrome (5321551235).

The spelling of 1221320014 in words is "one billion, two hundred twenty-one million, three hundred twenty thousand, fourteen".