321224432340021 has 32 divisors (see below), whose sum is σ = 506366598186240. Its totient is φ = 177226236665856.

The previous prime is 321224432339983. The next prime is 321224432340037. The reversal of 321224432340021 is 120043234422123.

It is a happy number.

It is not a de Polignac number, because 321224432340021 - 2⁶ = 321224432339957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321224432340041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109214325 + ... + 112116981.

It is an arithmetic number, because the mean of its divisors is an integer number (15823956193320).

Almost surely, 2^{321224432340021} is an apocalyptic number.

It is an amenable number.

321224432340021 is a deficient number, since it is larger than the sum of its proper divisors (185142165846219).

321224432340021 is a wasteful number, since it uses less digits than its factorization.

321224432340021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3084413.

The product of its (nonzero) digits is 55296, while the sum is 33.

Adding to 321224432340021 its reverse (120043234422123), we get a palindrome (441267666762144).

The spelling of 321224432340021 in words is "three hundred twenty-one trillion, two hundred twenty-four billion, four hundred thirty-two million, three hundred forty thousand, twenty-one".