1320310421 has 4 divisors (see below), whose sum is σ = 1321344000. Its totient is φ = 1319276844.

The previous prime is 1320310379. The next prime is 1320310427. The reversal of 1320310421 is 1240130231.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1240130231 = 31 ⋅40004201.

It is a cyclic number.

It is not a de Polignac number, because 1320310421 - 2²² = 1316116117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1320310421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320310427) 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, 514871 + ... + 517428.

It is an arithmetic number, because the mean of its divisors is an integer number (330336000).

Almost surely, 2^1320310421 is an apocalyptic number.

It is an amenable number.

1320310421 is a deficient number, since it is larger than the sum of its proper divisors (1033579).

1320310421 is a wasteful number, since it uses less digits than its factorization.

1320310421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033578.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1320310421 is about 36336.0760264506. The cubic root of 1320310421 is about 1097.0472936020.

Adding to 1320310421 its reverse (1240130231), we get a palindrome (2560440652).

The spelling of 1320310421 in words is "one billion, three hundred twenty million, three hundred ten thousand, four hundred twenty-one".