1421303434321 has 4 divisors (see below), whose sum is σ = 1459717040692. Its totient is φ = 1382889827952.

The previous prime is 1421303434297. The next prime is 1421303434357. The reversal of 1421303434321 is 1234343031241.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1007132673600 + 414170760721 = 1003560^2 + 643561^2 .

It is a cyclic number.

It is not a de Polignac number, because 1421303434321 - 2⁷ = 1421303434193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1421303434381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19206803130 + ... + 19206803203.

It is an arithmetic number, because the mean of its divisors is an integer number (364929260173).

Almost surely, 2^{1421303434321} is an apocalyptic number.

It is an amenable number.

1421303434321 is a deficient number, since it is larger than the sum of its proper divisors (38413606371).

1421303434321 is an equidigital number, since it uses as much as digits as its factorization.

1421303434321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38413606370.

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 1421303434321 its reverse (1234343031241), we get a palindrome (2655646465562).

The spelling of 1421303434321 in words is "one trillion, four hundred twenty-one billion, three hundred three million, four hundred thirty-four thousand, three hundred twenty-one".