123122113121 has 16 divisors (see below), whose sum is σ = 141386144640. Its totient is φ = 105027269760.

The previous prime is 123122113111. The next prime is 123122113141. The reversal of 123122113121 is 121311221321.

It is not a de Polignac number, because 123122113121 - 2²⁶ = 123055004257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 123122113093 and 123122113102.

It is not an unprimeable number, because it can be changed into a prime (123122113111) 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, 4025930 + ... + 4056396.

It is an arithmetic number, because the mean of its divisors is an integer number (8836634040).

Almost surely, 2^123122113121 is an apocalyptic number.

It is an amenable number.

123122113121 is a deficient number, since it is larger than the sum of its proper divisors (18264031519).

123122113121 is a wasteful number, since it uses less digits than its factorization.

123122113121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33224.

The product of its digits is 144, while the sum is 20.

Adding to 123122113121 its reverse (121311221321), we get a palindrome (244433334442).

The spelling of 123122113121 in words is "one hundred twenty-three billion, one hundred twenty-two million, one hundred thirteen thousand, one hundred twenty-one".