221312223311 has 4 divisors (see below), whose sum is σ = 221544451152. Its totient is φ = 221079995472.

The previous prime is 221312223283. The next prime is 221312223403. The reversal of 221312223311 is 113322213122.

221312223311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 221312223311 - 2⁶ = 221312223247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221312223211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116112491 + ... + 116114396.

It is an arithmetic number, because the mean of its divisors is an integer number (55386112788).

Almost surely, 2^221312223311 is an apocalyptic number.

221312223311 is a deficient number, since it is larger than the sum of its proper divisors (232227841).

221312223311 is an equidigital number, since it uses as much as digits as its factorization.

221312223311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232227840.

The product of its digits is 864, while the sum is 23.

Adding to 221312223311 its reverse (113322213122), we get a palindrome (334634436433).

The spelling of 221312223311 in words is "two hundred twenty-one billion, three hundred twelve million, two hundred twenty-three thousand, three hundred eleven".