321123121322011 has 4 divisors (see below), whose sum is σ = 340012716693912. Its totient is φ = 302233525950112.

The previous prime is 321123121321991. The next prime is 321123121322021. The reversal of 321123121322011 is 110223121321123.

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 321123121322011 - 2¹⁷ = 321123121190939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321123121322021) 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, 9444797685925 + ... + 9444797685958.

It is an arithmetic number, because the mean of its divisors is an integer number (85003179173478).

Almost surely, 2^{321123121322011} is an apocalyptic number.

321123121322011 is a deficient number, since it is larger than the sum of its proper divisors (18889595371901).

321123121322011 is a wasteful number, since it uses less digits than its factorization.

321123121322011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18889595371900.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 321123121322011 its reverse (110223121321123), we get a palindrome (431346242643134).

The spelling of 321123121322011 in words is "three hundred twenty-one trillion, one hundred twenty-three billion, one hundred twenty-one million, three hundred twenty-two thousand, eleven".