321611473621 has 8 divisors (see below), whose sum is σ = 322084367360. Its totient is φ = 321138674352.

The previous prime is 321611473613. The next prime is 321611473637. The reversal of 321611473621 is 126374116123.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 321611473621 - 2³ = 321611473613 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 (321611473021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9628876 + ... + 9662218.

It is an arithmetic number, because the mean of its divisors is an integer number (40260545920).

Almost surely, 2^321611473621 is an apocalyptic number.

It is an amenable number.

321611473621 is a deficient number, since it is larger than the sum of its proper divisors (472893739).

321611473621 is a wasteful number, since it uses less digits than its factorization.

321611473621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47235.

The product of its digits is 36288, while the sum is 37.

Adding to 321611473621 its reverse (126374116123), we get a palindrome (447985589744).

The spelling of 321611473621 in words is "three hundred twenty-one billion, six hundred eleven million, four hundred seventy-three thousand, six hundred twenty-one".