1221341330 has 24 divisors (see below), whose sum is σ = 2416441356. Its totient is φ = 444123680.

The previous prime is 1221341327. The next prime is 1221341411. The reversal of 1221341330 is 331431221.

It can be written as a sum of positive squares in 2 ways, for example, as 1138185169 + 83156161 = 33737^2 + 9119^2 .

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 503477 + ... + 505896.

Almost surely, 2^1221341330 is an apocalyptic number.

1221341330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221341330 is a deficient number, since it is larger than the sum of its proper divisors (1195100026).

1221341330 is a wasteful number, since it uses less digits than its factorization.

1221341330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009402 (or 1009391 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1221341330 is about 34947.6942014777. The cubic root of 1221341330 is about 1068.9211853512.

Adding to 1221341330 its reverse (331431221), we get a palindrome (1552772551).

The spelling of 1221341330 in words is "one billion, two hundred twenty-one million, three hundred forty-one thousand, three hundred thirty".