321320110121 has 4 divisors (see below), whose sum is σ = 323177451972. Its totient is φ = 319462768272.

The previous prime is 321320110093. The next prime is 321320110123. The reversal of 321320110121 is 121011023123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121011023123 = 19 ⋅6369001217.

It can be written as a sum of positive squares in 2 ways, for example, as 291129310096 + 30190800025 = 539564^2 + 173755^2 .

It is a cyclic number.

It is not a de Polignac number, because 321320110121 - 2³⁰ = 320246368297 is a prime.

It is a super-2 number, since 2×321320110121² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 321320110121.

It is not an unprimeable number, because it can be changed into a prime (321320110123) 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, 928670666 + ... + 928671011.

It is an arithmetic number, because the mean of its divisors is an integer number (80794362993).

Almost surely, 2^321320110121 is an apocalyptic number.

It is an amenable number.

321320110121 is a deficient number, since it is larger than the sum of its proper divisors (1857341851).

321320110121 is a wasteful number, since it uses less digits than its factorization.

321320110121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1857341850.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 321320110121 its reverse (121011023123), we get a palindrome (442331133244).

The spelling of 321320110121 in words is "three hundred twenty-one billion, three hundred twenty million, one hundred ten thousand, one hundred twenty-one".