321103413424421 has 4 divisors (see below), whose sum is σ = 324413757892812. Its totient is φ = 317793068956032.

The previous prime is 321103413424411. The next prime is 321103413424511. The reversal of 321103413424421 is 124424314301123.

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 128481907620196 + 192621505804225 = 11334986^2 + 13878815^2 .

It is a cyclic number.

It is not a de Polignac number, because 321103413424421 - 2³⁴ = 321086233555237 is a prime.

It is a super-2 number, since 2×321103413424421² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321103413424411) 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, 1655172234050 + ... + 1655172234243.

It is an arithmetic number, because the mean of its divisors is an integer number (81103439473203).

Almost surely, 2^{321103413424421} is an apocalyptic number.

It is an amenable number.

321103413424421 is a deficient number, since it is larger than the sum of its proper divisors (3310344468391).

321103413424421 is an equidigital number, since it uses as much as digits as its factorization.

321103413424421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3310344468390.

The product of its (nonzero) digits is 55296, while the sum is 35.

Adding to 321103413424421 its reverse (124424314301123), we get a palindrome (445527727725544).

The spelling of 321103413424421 in words is "three hundred twenty-one trillion, one hundred three billion, four hundred thirteen million, four hundred twenty-four thousand, four hundred twenty-one".