311020213223 has 4 divisors (see below), whose sum is σ = 311021418720. Its totient is φ = 311019007728.

The previous prime is 311020213211. The next prime is 311020213261. The reversal of 311020213223 is 322312020113.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 311020213223 - 2¹⁸ = 311019951079 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311020213195 and 311020213204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311020213523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41615 + ... + 789792.

It is an arithmetic number, because the mean of its divisors is an integer number (77755354680).

Almost surely, 2^311020213223 is an apocalyptic number.

311020213223 is a deficient number, since it is larger than the sum of its proper divisors (1205497).

311020213223 is an equidigital number, since it uses as much as digits as its factorization.

311020213223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1205496.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 311020213223 its reverse (322312020113), we get a palindrome (633332233336).

The spelling of 311020213223 in words is "three hundred eleven billion, twenty million, two hundred thirteen thousand, two hundred twenty-three".