123223031311 has 4 divisors (see below), whose sum is σ = 123281739000. Its totient is φ = 123164323624.

The previous prime is 123223031293. The next prime is 123223031333. The reversal of 123223031311 is 113130322321.

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 123223031311 - 2²¹ = 123220934159 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 (123223031341) 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, 29350696 + ... + 29354893.

It is an arithmetic number, because the mean of its divisors is an integer number (30820434750).

Almost surely, 2^123223031311 is an apocalyptic number.

123223031311 is a deficient number, since it is larger than the sum of its proper divisors (58707689).

123223031311 is an equidigital number, since it uses as much as digits as its factorization.

123223031311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58707688.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 123223031311 its reverse (113130322321), we get a palindrome (236353353632).

The spelling of 123223031311 in words is "one hundred twenty-three billion, two hundred twenty-three million, thirty-one thousand, three hundred eleven".