321320011 has 4 divisors (see below), whose sum is σ = 321374800. Its totient is φ = 321265224.

The previous prime is 321319981. The next prime is 321320023. The reversal of 321320011 is 110023123.

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 321320011 - 2²¹ = 319222859 is a prime.

It is a super-3 number, since 3×321320011³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321319973 and 321320000.

It is not an unprimeable number, because it can be changed into a prime (321320081) 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, 17376 + ... + 30733.

It is an arithmetic number, because the mean of its divisors is an integer number (80343700).

Almost surely, 2^321320011 is an apocalyptic number.

321320011 is a deficient number, since it is larger than the sum of its proper divisors (54789).

321320011 is an equidigital number, since it uses as much as digits as its factorization.

321320011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54788.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 321320011 is about 17925.4012786325. The cubic root of 321320011 is about 684.9295830433.

Adding to 321320011 its reverse (110023123), we get a palindrome (431343134).

The spelling of 321320011 in words is "three hundred twenty-one million, three hundred twenty thousand, eleven".