1321303023 has 28 divisors (see below), whose sum is σ = 2029412448. Its totient is φ = 859364640.

The previous prime is 1321303021. The next prime is 1321303033. The reversal of 1321303023 is 3203031231.

It is not a de Polignac number, because 1321303023 - 2¹ = 1321303021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1321302987 and 1321303005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321303021) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 7786 + ... + 51992.

It is an arithmetic number, because the mean of its divisors is an integer number (72479016).

Almost surely, 2^1321303023 is an apocalyptic number.

1321303023 is a deficient number, since it is larger than the sum of its proper divisors (708109425).

1321303023 is an frugal number, since it uses more digits than its factorization.

1321303023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44266 (or 44251 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 1321303023 is about 36349.7320897968. The cubic root of 1321303023 is about 1097.3221427461.

Adding to 1321303023 its reverse (3203031231), we get a palindrome (4524334254).

The spelling of 1321303023 in words is "one billion, three hundred twenty-one million, three hundred three thousand, twenty-three".