1313030221 has 4 divisors (see below), whose sum is σ = 1313217792. Its totient is φ = 1312842652.

The previous prime is 1313030209. The next prime is 1313030227. The reversal of 1313030221 is 1220303131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1313030221 - 2⁵ = 1313030189 is a prime.

It is a super-2 number, since 2×1313030221² = 3448096722518617682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1313030195 and 1313030204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313030227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82861 + ... + 97426.

It is an arithmetic number, because the mean of its divisors is an integer number (328304448).

Almost surely, 2^1313030221 is an apocalyptic number.

It is an amenable number.

1313030221 is a deficient number, since it is larger than the sum of its proper divisors (187571).

1313030221 is an equidigital number, since it uses as much as digits as its factorization.

1313030221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187570.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1313030221 is about 36235.7588715898. The cubic root of 1313030221 is about 1095.0272008700.

Adding to 1313030221 its reverse (1220303131), we get a palindrome (2533333352).

The spelling of 1313030221 in words is "one billion, three hundred thirteen million, thirty thousand, two hundred twenty-one".