321120312231 has 4 divisors (see below), whose sum is σ = 428160416312. Its totient is φ = 214080208152.

The previous prime is 321120312223. The next prime is 321120312239. The reversal of 321120312231 is 132213021123.

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

It is an interprime number because it is at equal distance from previous prime (321120312223) and next prime (321120312239).

It is not a de Polignac number, because 321120312231 - 2³ = 321120312223 is a prime.

It is a super-2 number, since 2×321120312231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321120312198 and 321120312207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321120312239) 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, 53520052036 + ... + 53520052041.

It is an arithmetic number, because the mean of its divisors is an integer number (107040104078).

Almost surely, 2^321120312231 is an apocalyptic number.

321120312231 is a deficient number, since it is larger than the sum of its proper divisors (107040104081).

321120312231 is a wasteful number, since it uses less digits than its factorization.

321120312231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107040104080.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 321120312231 its reverse (132213021123), we get a palindrome (453333333354).

The spelling of 321120312231 in words is "three hundred twenty-one billion, one hundred twenty million, three hundred twelve thousand, two hundred thirty-one".