1300021001 has 2 divisors, whose sum is σ = 1300021002. Its totient is φ = 1300021000.

The previous prime is 1300020947. The next prime is 1300021013. The reversal of 1300021001 is 1001200031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 978751225 + 321269776 = 31285^2 + 17924^2 .

It is a cyclic number.

It is not a de Polignac number, because 1300021001 - 2¹⁰ = 1300019977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1300021001.

It is not a weakly prime, because it can be changed into another prime (1300024001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 650010500 + 650010501.

It is an arithmetic number, because the mean of its divisors is an integer number (650010501).

Almost surely, 2^1300021001 is an apocalyptic number.

It is an amenable number.

1300021001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1300021001 is an equidigital number, since it uses as much as digits as its factorization.

1300021001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 1300021001 is about 36055.8039849342. The cubic root of 1300021001 is about 1091.3987600402.

Adding to 1300021001 its reverse (1001200031), we get a palindrome (2301221032).

The spelling of 1300021001 in words is "one billion, three hundred million, twenty-one thousand, one".