1313001221 has 8 divisors (see below), whose sum is σ = 1502195520. Its totient is φ = 1124212608.

The previous prime is 1313001199. The next prime is 1313001223. The reversal of 1313001221 is 1221003131.

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 1313001221 - 2¹⁰ = 1313000197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1313001196 and 1313001205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313001223) 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, 94451 + ... + 107456.

It is an arithmetic number, because the mean of its divisors is an integer number (187774440).

Almost surely, 2^1313001221 is an apocalyptic number.

It is an amenable number.

1313001221 is a deficient number, since it is larger than the sum of its proper divisors (189194299).

1313001221 is an equidigital number, since it uses as much as digits as its factorization.

1313001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202843.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1313001221 is about 36235.3587121750. The cubic root of 1313001221 is about 1095.0191391052.

Adding to 1313001221 its reverse (1221003131), we get a palindrome (2534004352).

The spelling of 1313001221 in words is "one billion, three hundred thirteen million, one thousand, two hundred twenty-one".