320400201311 has 4 divisors (see below), whose sum is σ = 320992438824. Its totient is φ = 319807963800.

The previous prime is 320400201307. The next prime is 320400201347. The reversal of 320400201311 is 113102004023.

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 320400201311 - 2² = 320400201307 is a prime.

It is a super-2 number, since 2×320400201311² (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 320400201311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320400201211) 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, 296117945 + ... + 296119026.

It is an arithmetic number, because the mean of its divisors is an integer number (80248109706).

Almost surely, 2^320400201311 is an apocalyptic number.

320400201311 is a deficient number, since it is larger than the sum of its proper divisors (592237513).

320400201311 is an equidigital number, since it uses as much as digits as its factorization.

320400201311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592237512.

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

Adding to 320400201311 its reverse (113102004023), we get a palindrome (433502205334).

The spelling of 320400201311 in words is "three hundred twenty billion, four hundred million, two hundred one thousand, three hundred eleven".