1321421330 has 32 divisors (see below), whose sum is σ = 2449390320. Its totient is φ = 512904960.

The previous prime is 1321421317. The next prime is 1321421341. The reversal of 1321421330 is 331241231.

It can be written as a sum of positive squares in 8 ways, for example, as 781370209 + 540051121 = 27953^2 + 23239^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139340 + ... + 148520.

Almost surely, 2^1321421330 is an apocalyptic number.

1321421330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321421330 is a deficient number, since it is larger than the sum of its proper divisors (1127968990).

1321421330 is a wasteful number, since it uses less digits than its factorization.

1321421330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9614.

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

The square root of 1321421330 is about 36351.3593968644. The cubic root of 1321421330 is about 1097.3548924924.

Adding to 1321421330 its reverse (331241231), we get a palindrome (1652662561).

The spelling of 1321421330 in words is "one billion, three hundred twenty-one million, four hundred twenty-one thousand, three hundred thirty".