1213321313321 has 8 divisors (see below), whose sum is σ = 1306668209280. Its totient is φ = 1119976486992.

The previous prime is 1213321313279. The next prime is 1213321313339. The reversal of 1213321313321 is 1233131233121.

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 1213321313321 - 2⁶ = 1213321313257 is a prime.

It is a super-3 number, since 3×1213321313321³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1213321313821) 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, 830210 + ... + 1765188.

It is an arithmetic number, because the mean of its divisors is an integer number (163333526160).

Almost surely, 2^{1213321313321} is an apocalyptic number.

It is an amenable number.

1213321313321 is a deficient number, since it is larger than the sum of its proper divisors (93346895959).

1213321313321 is an equidigital number, since it uses as much as digits as its factorization.

1213321313321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034815.

The product of its digits is 1944, while the sum is 26.

Adding to 1213321313321 its reverse (1233131233121), we get a palindrome (2446452546442).

The spelling of 1213321313321 in words is "one trillion, two hundred thirteen billion, three hundred twenty-one million, three hundred thirteen thousand, three hundred twenty-one".