1301311210021 has 2 divisors, whose sum is σ = 1301311210022. Its totient is φ = 1301311210020.

The previous prime is 1301311210009. The next prime is 1301311210033. The reversal of 1301311210021 is 1200121131031.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (1301311210009) and next prime (1301311210033).

It can be written as a sum of positive squares in only one way, i.e., 1067936228100 + 233374981921 = 1033410^2 + 483089^2 .

It is a cyclic number.

It is not a de Polignac number, because 1301311210021 - 2⁹ = 1301311209509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1301311209977 and 1301311210004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1301311210081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 650655605010 + 650655605011.

It is an arithmetic number, because the mean of its divisors is an integer number (650655605011).

Almost surely, 2^{1301311210021} is an apocalyptic number.

It is an amenable number.

1301311210021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1301311210021 is an equidigital number, since it uses as much as digits as its factorization.

1301311210021 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 16.

Adding to 1301311210021 its reverse (1200121131031), we get a palindrome (2501432341052).

The spelling of 1301311210021 in words is "one trillion, three hundred one billion, three hundred eleven million, two hundred ten thousand, twenty-one".