123220122311 has 16 divisors (see below), whose sum is σ = 146195407008. Its totient is φ = 102377712000.

The previous prime is 123220122293. The next prime is 123220122323. The reversal of 123220122311 is 113221022321.

It is a cyclic number.

It is not a de Polignac number, because 123220122311 - 2²⁶ = 123153013447 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 (123220122371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4251296 + ... + 4280181.

It is an arithmetic number, because the mean of its divisors is an integer number (9137212938).

Almost surely, 2^123220122311 is an apocalyptic number.

123220122311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

123220122311 is a deficient number, since it is larger than the sum of its proper divisors (22975284697).

123220122311 is a wasteful number, since it uses less digits than its factorization.

123220122311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8531602.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 123220122311 its reverse (113221022321), we get a palindrome (236441144632).

The spelling of 123220122311 in words is "one hundred twenty-three billion, two hundred twenty million, one hundred twenty-two thousand, three hundred eleven".