1213335321 has 32 divisors (see below), whose sum is σ = 1843931520. Its totient is φ = 702912000.

The previous prime is 1213335317. The next prime is 1213335329. The reversal of 1213335321 is 1235333121.

It is not a de Polignac number, because 1213335321 - 2² = 1213335317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1213335291 and 1213335300.

It is not an unprimeable number, because it can be changed into a prime (1213335329) 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 31 ways as a sum of consecutive naturals, for example, 90381 + ... + 102933.

It is an arithmetic number, because the mean of its divisors is an integer number (57622860).

Almost surely, 2^1213335321 is an apocalyptic number.

1213335321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1213335321 is a deficient number, since it is larger than the sum of its proper divisors (630596199).

1213335321 is a wasteful number, since it uses less digits than its factorization.

1213335321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12697.

The product of its digits is 1620, while the sum is 24.

The square root of 1213335321 is about 34832.9631383837. The cubic root of 1213335321 is about 1066.5804364646.

Adding to 1213335321 its reverse (1235333121), we get a palindrome (2448668442).

The spelling of 1213335321 in words is "one billion, two hundred thirteen million, three hundred thirty-five thousand, three hundred twenty-one".