1310021023 has 4 divisors (see below), whose sum is σ = 1310984928. Its totient is φ = 1309057120.

The previous prime is 1310021021. The next prime is 1310021029. The reversal of 1310021023 is 3201200131.

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

It is a cyclic number.

It is not a de Polignac number, because 1310021023 - 2¹ = 1310021021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1310020994 and 1310021012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1310021021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 479911 + ... + 482632.

It is an arithmetic number, because the mean of its divisors is an integer number (327746232).

Almost surely, 2^1310021023 is an apocalyptic number.

1310021023 is a deficient number, since it is larger than the sum of its proper divisors (963905).

1310021023 is an equidigital number, since it uses as much as digits as its factorization.

1310021023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963904.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1310021023 is about 36194.2125622315. The cubic root of 1310021023 is about 1094.1900345215.

Adding to 1310021023 its reverse (3201200131), we get a palindrome (4511221154).

The spelling of 1310021023 in words is "one billion, three hundred ten million, twenty-one thousand, twenty-three".