321420021334321 has 24 divisors (see below), whose sum is σ = 402719500302504. Its totient is φ = 254271535015680.

The previous prime is 321420021334267. The next prime is 321420021334331. The reversal of 321420021334321 is 123433120024123.

It can be written as a sum of positive squares in 4 ways, for example, as 6695958399025 + 314724062935296 = 2587655^2 + 17740464^2 .

It is not a de Polignac number, because 321420021334321 - 2⁷ = 321420021334193 is a prime.

It is a super-2 number, since 2×321420021334321² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (321420021334331) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34325970 + ... + 42674491.

It is an arithmetic number, because the mean of its divisors is an integer number (16779979179271).

Almost surely, 2^{321420021334321} is an apocalyptic number.

It is an amenable number.

321420021334321 is a deficient number, since it is larger than the sum of its proper divisors (81299478968183).

321420021334321 is a wasteful number, since it uses less digits than its factorization.

321420021334321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77007041 (or 77007034 counting only the distinct ones).

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

Adding to 321420021334321 its reverse (123433120024123), we get a palindrome (444853141358444).

The spelling of 321420021334321 in words is "three hundred twenty-one trillion, four hundred twenty billion, twenty-one million, three hundred thirty-four thousand, three hundred twenty-one".