321221103011 has 12 divisors (see below), whose sum is σ = 336109416552. Its totient is φ = 306947069184.

The previous prime is 321221103001. The next prime is 321221103029. The reversal of 321221103011 is 110301122123.

It is a de Polignac number, because none of the positive numbers 2^k-321221103011 is a prime.

It is a super-2 number, since 2×321221103011² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321221103001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1887245 + ... + 2050398.

It is an arithmetic number, because the mean of its divisors is an integer number (28009118046).

Almost surely, 2^321221103011 is an apocalyptic number.

321221103011 is a deficient number, since it is larger than the sum of its proper divisors (14888313541).

321221103011 is an equidigital number, since it uses as much as digits as its factorization.

321221103011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3937798 (or 3937769 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 321221103011 its reverse (110301122123), we get a palindrome (431522225134).

The spelling of 321221103011 in words is "three hundred twenty-one billion, two hundred twenty-one million, one hundred three thousand, eleven".