1021320023 has 2 divisors, whose sum is σ = 1021320024. Its totient is φ = 1021320022.

The previous prime is 1021319993. The next prime is 1021320049. The reversal of 1021320023 is 3200231201.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1021320023 - 2¹⁰ = 1021318999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021320523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510660011 + 510660012.

It is an arithmetic number, because the mean of its divisors is an integer number (510660012).

Almost surely, 2^1021320023 is an apocalyptic number.

1021320023 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021320023 is an equidigital number, since it uses as much as digits as its factorization.

1021320023 is an evil number, because the sum of its binary digits is even.

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

The square root of 1021320023 is about 31958.0979252521. The cubic root of 1021320023 is about 1007.0567593437.

Adding to 1021320023 its reverse (3200231201), we get a palindrome (4221551224).

The spelling of 1021320023 in words is "one billion, twenty-one million, three hundred twenty thousand, twenty-three".