1304123430021 has 16 divisors (see below), whose sum is σ = 1798832836800. Its totient is φ = 839416218368.

The previous prime is 1304123430019. The next prime is 1304123430037. The reversal of 1304123430021 is 1200343214031.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1304123430021 - 2¹ = 1304123430019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1304123429973 and 1304123430000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304123430041) 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 in 15 ways as a sum of consecutive naturals, for example, 4211710 + ... + 4510736.

It is an arithmetic number, because the mean of its divisors is an integer number (112427052300).

Almost surely, 2^{1304123430021} is an apocalyptic number.

It is an amenable number.

1304123430021 is a deficient number, since it is larger than the sum of its proper divisors (494709406779).

1304123430021 is a wasteful number, since it uses less digits than its factorization.

1304123430021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349188.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 1304123430021 its reverse (1200343214031), we get a palindrome (2504466644052).

The spelling of 1304123430021 in words is "one trillion, three hundred four billion, one hundred twenty-three million, four hundred thirty thousand, twenty-one".