1221443432 has 16 divisors (see below), whose sum is σ = 2498407200. Its totient is φ = 555201520.

The previous prime is 1221443417. The next prime is 1221443453. The reversal of 1221443432 is 2343441221.

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, 6939932 + ... + 6940107.

It is an arithmetic number, because the mean of its divisors is an integer number (156150450).

Almost surely, 2^1221443432 is an apocalyptic number.

It is an amenable number.

1221443432 is an abundant number, since it is smaller than the sum of its proper divisors (1276963768).

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

1221443432 is a wasteful number, since it uses less digits than its factorization.

1221443432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13880056 (or 13880052 counting only the distinct ones).

The product of its digits is 4608, while the sum is 26.

The square root of 1221443432 is about 34949.1549540186. The cubic root of 1221443432 is about 1068.9509711687.

Adding to 1221443432 its reverse (2343441221), we get a palindrome (3564884653).

The spelling of 1221443432 in words is "one billion, two hundred twenty-one million, four hundred forty-three thousand, four hundred thirty-two".