1221143344 has 40 divisors (see below), whose sum is σ = 2432969280. Its totient is φ = 593395200.

The previous prime is 1221143321. The next prime is 1221143377. The reversal of 1221143344 is 4433411221.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174342 + ... + 181210.

It is an arithmetic number, because the mean of its divisors is an integer number (60824232).

Almost surely, 2^1221143344 is an apocalyptic number.

It is an amenable number.

1221143344 is a deficient number, since it is larger than the sum of its proper divisors (1211825936).

1221143344 is a wasteful number, since it uses less digits than its factorization.

1221143344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7189 (or 7183 counting only the distinct ones).

The product of its digits is 2304, while the sum is 25.

The square root of 1221143344 is about 34944.8614820548. The cubic root of 1221143344 is about 1068.8634229384.

Adding to 1221143344 its reverse (4433411221), we get a palindrome (5654554565).

It can be divided in two parts, 12211 and 43344, that added together give a palindrome (55555).

The spelling of 1221143344 in words is "one billion, two hundred twenty-one million, one hundred forty-three thousand, three hundred forty-four".