321420312033421 has 4 divisors (see below), whose sum is σ = 321441827565600. Its totient is φ = 321398796501244.

The previous prime is 321420312033391. The next prime is 321420312033493. The reversal of 321420312033421 is 124330213024123.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 321420312033421 - 2⁹ = 321420312032909 is a prime.

It is a super-2 number, since 2×321420312033421² (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 (321420312033521) 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, 10757743681 + ... + 10757773558.

It is an arithmetic number, because the mean of its divisors is an integer number (80360456891400).

Almost surely, 2^{321420312033421} is an apocalyptic number.

It is an amenable number.

321420312033421 is a deficient number, since it is larger than the sum of its proper divisors (21515532179).

321420312033421 is a wasteful number, since it uses less digits than its factorization.

321420312033421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21515532178.

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 321420312033421 its reverse (124330213024123), we get a palindrome (445750525057544).

The spelling of 321420312033421 in words is "three hundred twenty-one trillion, four hundred twenty billion, three hundred twelve million, thirty-three thousand, four hundred twenty-one".