123102121 has 4 divisors (see below), whose sum is σ = 129581200. Its totient is φ = 116623044.

The previous prime is 123102113. The next prime is 123102149. The reversal of 123102121 is 121201321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 123102121 - 2³ = 123102113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123102181) 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, 3239511 + ... + 3239548.

It is an arithmetic number, because the mean of its divisors is an integer number (32395300).

Almost surely, 2^123102121 is an apocalyptic number.

It is an amenable number.

123102121 is a deficient number, since it is larger than the sum of its proper divisors (6479079).

123102121 is an equidigital number, since it uses as much as digits as its factorization.

123102121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6479078.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 123102121 is about 11095.1395214301. The cubic root of 123102121 is about 497.4565786199.

Adding to 123102121 its reverse (121201321), we get a palindrome (244303442).

The spelling of 123102121 in words is "one hundred twenty-three million, one hundred two thousand, one hundred twenty-one".