1300310021 has 4 divisors (see below), whose sum is σ = 1300419372. Its totient is φ = 1300200672.

The previous prime is 1300310009. The next prime is 1300310029. The reversal of 1300310021 is 1200130031.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 937216996 + 363093025 = 30614^2 + 19055^2 .

It is a cyclic number.

It is not a de Polignac number, because 1300310021 - 2¹⁸ = 1300047877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1300309984 and 1300310011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1300310029) 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, 34310 + ... + 61463.

It is an arithmetic number, because the mean of its divisors is an integer number (325104843).

Almost surely, 2^1300310021 is an apocalyptic number.

It is an amenable number.

1300310021 is a deficient number, since it is larger than the sum of its proper divisors (109351).

1300310021 is an equidigital number, since it uses as much as digits as its factorization.

1300310021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109350.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 1300310021 is about 36059.8117160919. The cubic root of 1300310021 is about 1091.4796337842.

Adding to 1300310021 its reverse (1200130031), we get a palindrome (2500440052).

The spelling of 1300310021 in words is "one billion, three hundred million, three hundred ten thousand, twenty-one".