1312213321 has 8 divisors (see below), whose sum is σ = 1383386400. Its totient is φ = 1241251200.

The previous prime is 1312213313. The next prime is 1312213339. The reversal of 1312213321 is 1233122131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1312213321 - 2³ = 1312213313 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312213121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39880 + ... + 64921.

It is an arithmetic number, because the mean of its divisors is an integer number (172923300).

Almost surely, 2^1312213321 is an apocalyptic number.

It is an amenable number.

1312213321 is a deficient number, since it is larger than the sum of its proper divisors (71173079).

1312213321 is a wasteful number, since it uses less digits than its factorization.

1312213321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105479.

The product of its digits is 216, while the sum is 19.

The square root of 1312213321 is about 36224.4851033110. The cubic root of 1312213321 is about 1094.8000638552.

Adding to 1312213321 its reverse (1233122131), we get a palindrome (2545335452).

The spelling of 1312213321 in words is "one billion, three hundred twelve million, two hundred thirteen thousand, three hundred twenty-one".