1204304202421 has 2 divisors, whose sum is σ = 1204304202422. Its totient is φ = 1204304202420.

The previous prime is 1204304202397. The next prime is 1204304202427. The reversal of 1204304202421 is 1242024034021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1170258786225 + 34045416196 = 1081785^2 + 184514^2 .

It is a cyclic number.

It is not a de Polignac number, because 1204304202421 - 2⁷ = 1204304202293 is a prime.

It is a super-2 number, since 2×1204304202421² (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 (1204304202427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602152101210 + 602152101211.

It is an arithmetic number, because the mean of its divisors is an integer number (602152101211).

Almost surely, 2^{1204304202421} is an apocalyptic number.

It is an amenable number.

1204304202421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1204304202421 is an equidigital number, since it uses as much as digits as its factorization.

1204304202421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 1204304202421 its reverse (1242024034021), we get a palindrome (2446328236442).

The spelling of 1204304202421 in words is "one trillion, two hundred four billion, three hundred four million, two hundred two thousand, four hundred twenty-one".