1303420404421 has 2 divisors, whose sum is σ = 1303420404422. Its totient is φ = 1303420404420.

The previous prime is 1303420404413. The next prime is 1303420404479. The reversal of 1303420404421 is 1244040243031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1006380144225 + 297040260196 = 1003185^2 + 545014^2 .

It is an emirp because it is prime and its reverse (1244040243031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1303420404421 - 2³ = 1303420404413 is a prime.

It is a super-2 number, since 2×1303420404421² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1303420404421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1303420404491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 651710202210 + 651710202211.

It is an arithmetic number, because the mean of its divisors is an integer number (651710202211).

Almost surely, 2^{1303420404421} is an apocalyptic number.

It is an amenable number.

1303420404421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1303420404421 is an equidigital number, since it uses as much as digits as its factorization.

1303420404421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 1303420404421 its reverse (1244040243031), we get a palindrome (2547460647452).

The spelling of 1303420404421 in words is "one trillion, three hundred three billion, four hundred twenty million, four hundred four thousand, four hundred twenty-one".