321111200221 has 4 divisors (see below), whose sum is σ = 366984228832. Its totient is φ = 275238171612.

The previous prime is 321111200021. The next prime is 321111200243. The reversal of 321111200221 is 122002111123.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122002111123 = 48073 ⋅2537851.

It is a cyclic number.

It is not a de Polignac number, because 321111200221 - 2¹³ = 321111192029 is a prime.

It is a super-2 number, since 2×321111200221² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321111200195 and 321111200204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321111200281) 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, 22936514295 + ... + 22936514308.

It is an arithmetic number, because the mean of its divisors is an integer number (91746057208).

Almost surely, 2^321111200221 is an apocalyptic number.

It is an amenable number.

321111200221 is a deficient number, since it is larger than the sum of its proper divisors (45873028611).

321111200221 is an equidigital number, since it uses as much as digits as its factorization.

321111200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45873028610.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 321111200221 its reverse (122002111123), we get a palindrome (443113311344).

The spelling of 321111200221 in words is "three hundred twenty-one billion, one hundred eleven million, two hundred thousand, two hundred twenty-one".