123011103121 has 4 divisors (see below), whose sum is σ = 125027678644. Its totient is φ = 120994527600.

The previous prime is 123011103043. The next prime is 123011103151. The reversal of 123011103121 is 121301110321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121301110321 = 10151 ⋅11949671.

It can be written as a sum of positive squares in 2 ways, for example, as 13740528400 + 109270574721 = 117220^2 + 330561^2 .

It is a cyclic number.

It is not a de Polignac number, because 123011103121 - 2¹⁹ = 123010578833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123011103095 and 123011103104.

It is not an unprimeable number, because it can be changed into a prime (123011103151) 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, 1008287670 + ... + 1008287791.

It is an arithmetic number, because the mean of its divisors is an integer number (31256919661).

Almost surely, 2^123011103121 is an apocalyptic number.

It is an amenable number.

123011103121 is a deficient number, since it is larger than the sum of its proper divisors (2016575523).

123011103121 is an equidigital number, since it uses as much as digits as its factorization.

123011103121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2016575522.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 123011103121 its reverse (121301110321), we get a palindrome (244312213442).

The spelling of 123011103121 in words is "one hundred twenty-three billion, eleven million, one hundred three thousand, one hundred twenty-one".