321220320011 has 4 divisors (see below), whose sum is σ = 332296882800. Its totient is φ = 310143757224.

The previous prime is 321220320007. The next prime is 321220320013. The reversal of 321220320011 is 110023022123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 110023022123 = 7 ⋅15717574589.

It is a cyclic number.

It is not a de Polignac number, because 321220320011 - 2² = 321220320007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (321220320013) 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, 5538281351 + ... + 5538281408.

It is an arithmetic number, because the mean of its divisors is an integer number (83074220700).

Almost surely, 2^321220320011 is an apocalyptic number.

321220320011 is a deficient number, since it is larger than the sum of its proper divisors (11076562789).

321220320011 is a wasteful number, since it uses less digits than its factorization.

321220320011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11076562788.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 321220320011 its reverse (110023022123), we get a palindrome (431243342134).

The spelling of 321220320011 in words is "three hundred twenty-one billion, two hundred twenty million, three hundred twenty thousand, eleven".