321224230010021 has 4 divisors (see below), whose sum is σ = 345933786164652. Its totient is φ = 296514673855392.

The previous prime is 321224230010011. The next prime is 321224230010041. The reversal of 321224230010021 is 120010032422123.

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 179054640076900 + 142169589933121 = 13381130^2 + 11923489^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321224230010021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321224230010011) 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, 12354778077296 + ... + 12354778077321.

It is an arithmetic number, because the mean of its divisors is an integer number (86483446541163).

Almost surely, 2^{321224230010021} is an apocalyptic number.

It is an amenable number.

321224230010021 is a deficient number, since it is larger than the sum of its proper divisors (24709556154631).

321224230010021 is a wasteful number, since it uses less digits than its factorization.

321224230010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24709556154630.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 321224230010021 its reverse (120010032422123), we get a palindrome (441234262432144).

The spelling of 321224230010021 in words is "three hundred twenty-one trillion, two hundred twenty-four billion, two hundred thirty million, ten thousand, twenty-one".