1305314420021 has 2 divisors, whose sum is σ = 1305314420022. Its totient is φ = 1305314420020.

The previous prime is 1305314420017. The next prime is 1305314420051. The reversal of 1305314420021 is 1200244135031.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1200394140625 + 104920279396 = 1095625^2 + 323914^2 .

It is a cyclic number.

It is not a de Polignac number, because 1305314420021 - 2² = 1305314420017 is a prime.

It is a super-2 number, since 2×1305314420021² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1305314420051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652657210010 + 652657210011.

It is an arithmetic number, because the mean of its divisors is an integer number (652657210011).

Almost surely, 2^{1305314420021} is an apocalyptic number.

It is an amenable number.

1305314420021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1305314420021 is an equidigital number, since it uses as much as digits as its factorization.

1305314420021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 1305314420021 its reverse (1200244135031), we get a palindrome (2505558555052).

The spelling of 1305314420021 in words is "one trillion, three hundred five billion, three hundred fourteen million, four hundred twenty thousand, twenty-one".