123220220311 has 4 divisors (see below), whose sum is σ = 123640767432. Its totient is φ = 122799673192.

The previous prime is 123220220303. The next prime is 123220220329. The reversal of 123220220311 is 113022022321.

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 123220220311 - 2³ = 123220220303 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 (123220220341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210273121 + ... + 210273706.

It is an arithmetic number, because the mean of its divisors is an integer number (30910191858).

Almost surely, 2^123220220311 is an apocalyptic number.

123220220311 is a deficient number, since it is larger than the sum of its proper divisors (420547121).

123220220311 is an equidigital number, since it uses as much as digits as its factorization.

123220220311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420547120.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 123220220311 its reverse (113022022321), we get a palindrome (236242242632).

The spelling of 123220220311 in words is "one hundred twenty-three billion, two hundred twenty million, two hundred twenty thousand, three hundred eleven".