1213421330 has 64 divisors (see below), whose sum is σ = 2435194368. Its totient is φ = 431631360.

The previous prime is 1213421329. The next prime is 1213421357. The reversal of 1213421330 is 331243121.

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 31 ways as a sum of consecutive naturals, for example, 1099559 + ... + 1100661.

It is an arithmetic number, because the mean of its divisors is an integer number (38049912).

Almost surely, 2^1213421330 is an apocalyptic number.

1213421330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1213421330 is an abundant number, since it is smaller than the sum of its proper divisors (1221773038).

1213421330 is a wasteful number, since it uses less digits than its factorization.

1213421330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331.

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

The square root of 1213421330 is about 34834.1977085737. The cubic root of 1213421330 is about 1066.6056378929.

Adding to 1213421330 its reverse (331243121), we get a palindrome (1544664451).

The spelling of 1213421330 in words is "one billion, two hundred thirteen million, four hundred twenty-one thousand, three hundred thirty".