1301023021 has 2 divisors, whose sum is σ = 1301023022. Its totient is φ = 1301023020.

The previous prime is 1301023001. The next prime is 1301023051. The reversal of 1301023021 is 1203201031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1280637796 + 20385225 = 35786^2 + 4515^2 .

It is an emirp because it is prime and its reverse (1203201031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1301023021 - 2²⁵ = 1267468589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1301022992 and 1301023010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1301023001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 650511510 + 650511511.

It is an arithmetic number, because the mean of its divisors is an integer number (650511511).

Almost surely, 2^1301023021 is an apocalyptic number.

It is an amenable number.

1301023021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1301023021 is an equidigital number, since it uses as much as digits as its factorization.

1301023021 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1301023021 is about 36069.6967134463. The cubic root of 1301023021 is about 1091.6790946225.

Adding to 1301023021 its reverse (1203201031), we get a palindrome (2504224052).

The spelling of 1301023021 in words is "one billion, three hundred one million, twenty-three thousand, twenty-one".