321321131031021 has 16 divisors (see below), whose sum is σ = 467380539279360. Its totient is φ = 194738267459120.

The previous prime is 321321131031013. The next prime is 321321131031077. The reversal of 321321131031021 is 120130131123123.

It is not a de Polignac number, because 321321131031021 - 2³ = 321321131031013 is a prime.

It is a super-2 number, since 2×321321131031021² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 321321131030982 and 321321131031000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321321131031011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41694141 + ... + 48795938.

It is an arithmetic number, because the mean of its divisors is an integer number (29211283704960).

Almost surely, 2^{321321131031021} is an apocalyptic number.

It is an amenable number.

321321131031021 is a deficient number, since it is larger than the sum of its proper divisors (146059408248339).

321321131031021 is a wasteful number, since it uses less digits than its factorization.

321321131031021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90597696.

The product of its (nonzero) digits is 648, while the sum is 24.

Adding to 321321131031021 its reverse (120130131123123), we get a palindrome (441451262154144).

The spelling of 321321131031021 in words is "three hundred twenty-one trillion, three hundred twenty-one billion, one hundred thirty-one million, thirty-one thousand, twenty-one".