123220122111 has 24 divisors (see below), whose sum is σ = 178331194080. Its totient is φ = 81986913216.

The previous prime is 123220122107. The next prime is 123220122203. The reversal of 123220122111 is 111221022321.

123220122111 is a `hidden beast` number, since 1 + 232 + 201 + 221 + 11 = 666.

It is not a de Polignac number, because 123220122111 - 2² = 123220122107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123220122511) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19671166 + ... + 19677428.

It is an arithmetic number, because the mean of its divisors is an integer number (7430466420).

Almost surely, 2^123220122111 is an apocalyptic number.

123220122111 is a deficient number, since it is larger than the sum of its proper divisors (55111071969).

123220122111 is a wasteful number, since it uses less digits than its factorization.

123220122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10175 (or 10172 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 123220122111 its reverse (111221022321), we get a palindrome (234441144432).

The spelling of 123220122111 in words is "one hundred twenty-three billion, two hundred twenty million, one hundred twenty-two thousand, one hundred eleven".