321121212111 has 12 divisors (see below), whose sum is σ = 530104858192. Its totient is φ = 183497835456.

The previous prime is 321121212109. The next prime is 321121212143. The reversal of 321121212111 is 111212121123.

It is a happy number.

321121212111 is a `hidden beast` number, since 321 + 1 + 21 + 212 + 111 = 666.

It is not a de Polignac number, because 321121212111 - 2¹ = 321121212109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321121211111) 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 11 ways as a sum of consecutive naturals, for example, 2548580986 + ... + 2548581111.

Almost surely, 2^321121212111 is an apocalyptic number.

321121212111 is a deficient number, since it is larger than the sum of its proper divisors (208983646081).

321121212111 is a wasteful number, since it uses less digits than its factorization.

321121212111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5097162110 (or 5097162107 counting only the distinct ones).

The product of its digits is 48, while the sum is 18.

Adding to 321121212111 its reverse (111212121123), we get a palindrome (432333333234).

The spelling of 321121212111 in words is "three hundred twenty-one billion, one hundred twenty-one million, two hundred twelve thousand, one hundred eleven".