1221002344 has 16 divisors (see below), whose sum is σ = 2289752100. Its totient is φ = 610401792.

The previous prime is 1221002327. The next prime is 1221002347. The reversal of 1221002344 is 4432001221.

It can be written as a sum of positive squares in 2 ways, for example, as 1120240900 + 100761444 = 33470^2 + 10038^2 .

It is not an unprimeable number, because it can be changed into a prime (1221002347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82072 + ... + 95800.

Almost surely, 2^1221002344 is an apocalyptic number.

It is an amenable number.

1221002344 is a deficient number, since it is larger than the sum of its proper divisors (1068749756).

1221002344 is a wasteful number, since it uses less digits than its factorization.

1221002344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24852 (or 24848 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1221002344 is about 34942.8439598153. The cubic root of 1221002344 is about 1068.8222823837.

Adding to 1221002344 its reverse (4432001221), we get a palindrome (5653003565).

The spelling of 1221002344 in words is "one billion, two hundred twenty-one million, two thousand, three hundred forty-four".