321420244213405 has 4 divisors (see below), whose sum is σ = 385704293056092. Its totient is φ = 257136195370720.

The previous prime is 321420244213399. The next prime is 321420244213429. The reversal of 321420244213405 is 504312442024123.

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 78076062356356 + 243344181857049 = 8836066^2 + 15599493^2 .

It is not a de Polignac number, because 321420244213405 - 2³¹ = 321418096729757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32142024421336 + ... + 32142024421345.

It is an arithmetic number, because the mean of its divisors is an integer number (96426073264023).

Almost surely, 2^{321420244213405} is an apocalyptic number.

It is an amenable number.

321420244213405 is a deficient number, since it is larger than the sum of its proper divisors (64284048842687).

321420244213405 is an equidigital number, since it uses as much as digits as its factorization.

321420244213405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64284048842686.

The product of its (nonzero) digits is 184320, while the sum is 37.

Adding to 321420244213405 its reverse (504312442024123), we get a palindrome (825732686237528).

The spelling of 321420244213405 in words is "three hundred twenty-one trillion, four hundred twenty billion, two hundred forty-four million, two hundred thirteen thousand, four hundred five".