231228122311 has 4 divisors (see below), whose sum is σ = 231434025592. Its totient is φ = 231022219032.

The previous prime is 231228122309. The next prime is 231228122327. The reversal of 231228122311 is 113221822132.

231228122311 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 231228122311 - 2¹ = 231228122309 is a prime.

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 231228122311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231228122351) 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, 102949956 + ... + 102952201.

It is an arithmetic number, because the mean of its divisors is an integer number (57858506398).

Almost surely, 2^231228122311 is an apocalyptic number.

231228122311 is a deficient number, since it is larger than the sum of its proper divisors (205903281).

231228122311 is a wasteful number, since it uses less digits than its factorization.

231228122311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205903280.

The product of its digits is 2304, while the sum is 28.

Adding to 231228122311 its reverse (113221822132), we get a palindrome (344449944443).

The spelling of 231228122311 in words is "two hundred thirty-one billion, two hundred twenty-eight million, one hundred twenty-two thousand, three hundred eleven".