1313130321221 has 8 divisors (see below), whose sum is σ = 1343704037280. Its totient is φ = 1282558232592.

The previous prime is 1313130321199. The next prime is 1313130321227. The reversal of 1313130321221 is 1221230313131.

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 1313130321221 - 2¹⁸ = 1313130059077 is a prime.

It is a super-2 number, since 2×1313130321221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313130321227) 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, 1308935 + ... + 2083163.

It is an arithmetic number, because the mean of its divisors is an integer number (167963004660).

Almost surely, 2^{1313130321221} is an apocalyptic number.

It is an amenable number.

1313130321221 is a deficient number, since it is larger than the sum of its proper divisors (30573716059).

1313130321221 is an equidigital number, since it uses as much as digits as its factorization.

1313130321221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813715.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 1313130321221 its reverse (1221230313131), we get a palindrome (2534360634352).

The spelling of 1313130321221 in words is "one trillion, three hundred thirteen billion, one hundred thirty million, three hundred twenty-one thousand, two hundred twenty-one".