321212131111 has 8 divisors (see below), whose sum is σ = 321407210160. Its totient is φ = 321017115072.

The previous prime is 321212131109. The next prime is 321212131127. The reversal of 321212131111 is 111131212123.

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 321212131111 - 2¹ = 321212131109 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 (321212131151) 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, 13422825 + ... + 13446733.

It is an arithmetic number, because the mean of its divisors is an integer number (40175901270).

Almost surely, 2^321212131111 is an apocalyptic number.

321212131111 is a deficient number, since it is larger than the sum of its proper divisors (195079049).

321212131111 is a wasteful number, since it uses less digits than its factorization.

321212131111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31505.

The product of its digits is 72, while the sum is 19.

Adding to 321212131111 its reverse (111131212123), we get a palindrome (432343343234).

The spelling of 321212131111 in words is "three hundred twenty-one billion, two hundred twelve million, one hundred thirty-one thousand, one hundred eleven".