1221813714 has 24 divisors (see below), whose sum is σ = 2685972240. Its totient is φ = 370246360.

The previous prime is 1221813683. The next prime is 1221813727. The reversal of 1221813714 is 4173181221.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 840744 + ... + 842195.

It is an arithmetic number, because the mean of its divisors is an integer number (111915510).

Almost surely, 2^1221813714 is an apocalyptic number.

1221813714 is an abundant number, since it is smaller than the sum of its proper divisors (1464158526).

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

1221813714 is a wasteful number, since it uses less digits than its factorization.

1221813714 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1682966 (or 1682955 counting only the distinct ones).

The product of its digits is 2688, while the sum is 30.

The square root of 1221813714 is about 34954.4519911270. The cubic root of 1221813714 is about 1069.0589781662.

Adding to 1221813714 its reverse (4173181221), we get a palindrome (5394994935).

The spelling of 1221813714 in words is "one billion, two hundred twenty-one million, eight hundred thirteen thousand, seven hundred fourteen".