1300223021 has 4 divisors (see below), whose sum is σ = 1308949500. Its totient is φ = 1291496544.

The previous prime is 1300222961. The next prime is 1300223069. The reversal of 1300223021 is 1203220031.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47416996 + 1252806025 = 6886^2 + 35395^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1300223021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1300222987 and 1300223005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1300423021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4363016 + ... + 4363313.

It is an arithmetic number, because the mean of its divisors is an integer number (327237375).

Almost surely, 2^1300223021 is an apocalyptic number.

It is an amenable number.

1300223021 is a deficient number, since it is larger than the sum of its proper divisors (8726479).

1300223021 is an equidigital number, since it uses as much as digits as its factorization.

1300223021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8726478.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1300223021 is about 36058.6053668192. The cubic root of 1300223021 is about 1091.4552906546.

Adding to 1300223021 its reverse (1203220031), we get a palindrome (2503443052).

The spelling of 1300223021 in words is "one billion, three hundred million, two hundred twenty-three thousand, twenty-one".