321111121011 has 4 divisors (see below), whose sum is σ = 428148161352. Its totient is φ = 214074080672.

The previous prime is 321111121003. The next prime is 321111121013. The reversal of 321111121011 is 110121111123.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 321111121011 - 2³ = 321111121003 is a prime.

It is a super-2 number, since 2×321111121011² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (321111121013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53518520166 + ... + 53518520171.

It is an arithmetic number, because the mean of its divisors is an integer number (107037040338).

Almost surely, 2^321111121011 is an apocalyptic number.

321111121011 is a deficient number, since it is larger than the sum of its proper divisors (107037040341).

321111121011 is a wasteful number, since it uses less digits than its factorization.

321111121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107037040340.

The product of its (nonzero) digits is 12, while the sum is 15.

Adding to 321111121011 its reverse (110121111123), we get a palindrome (431232232134).

The spelling of 321111121011 in words is "three hundred twenty-one billion, one hundred eleven million, one hundred twenty-one thousand, eleven".