321230022010021 has 4 divisors (see below), whose sum is σ = 321230200280044. Its totient is φ = 321229843740000.

The previous prime is 321230022009997. The next prime is 321230022010103. The reversal of 321230022010021 is 120010220032123.

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 127876269281121 + 193353752728900 = 11308239^2 + 13905170^2 .

It is a cyclic number.

It is not a de Polignac number, because 321230022010021 - 2⁷ = 321230022009893 is a prime.

It is a super-2 number, since 2×321230022010021² (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 (321230022010421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86404230 + ... + 90045271.

It is an arithmetic number, because the mean of its divisors is an integer number (80307550070011).

Almost surely, 2^{321230022010021} is an apocalyptic number.

It is an amenable number.

321230022010021 is a deficient number, since it is larger than the sum of its proper divisors (178270023).

321230022010021 is a wasteful number, since it uses less digits than its factorization.

321230022010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178270022.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 321230022010021 its reverse (120010220032123), we get a palindrome (441240242042144).

The spelling of 321230022010021 in words is "three hundred twenty-one trillion, two hundred thirty billion, twenty-two million, ten thousand, twenty-one".