1311303621 has 8 divisors (see below), whose sum is σ = 1760983840. Its totient is φ = 867912912.

The previous prime is 1311303607. The next prime is 1311303647. The reversal of 1311303621 is 1263031131.

1311303621 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1311303621 - 2²² = 1307109317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311303691) 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, 1571890 + ... + 1572723.

It is an arithmetic number, because the mean of its divisors is an integer number (220122980).

Almost surely, 2^1311303621 is an apocalyptic number.

It is an amenable number.

1311303621 is a deficient number, since it is larger than the sum of its proper divisors (449680219).

1311303621 is a wasteful number, since it uses less digits than its factorization.

1311303621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3144755.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 1311303621 is about 36211.9265021899. The cubic root of 1311303621 is about 1094.5470130649.

Adding to 1311303621 its reverse (1263031131), we get a palindrome (2574334752).

The spelling of 1311303621 in words is "one billion, three hundred eleven million, three hundred three thousand, six hundred twenty-one".