123130121 has 4 divisors (see below), whose sum is σ = 124967952. Its totient is φ = 121292292.

The previous prime is 123130097. The next prime is 123130129. The reversal of 123130121 is 121031321.

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 123130121 - 2⁶ = 123130057 is a prime.

It is a super-2 number, since 2×123130121² = 30322053394949282, which contains 22 as substring.

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 = 123130096 and 123130105.

It is not an unprimeable number, because it can be changed into a prime (123130129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 918815 + ... + 918948.

It is an arithmetic number, because the mean of its divisors is an integer number (31241988).

Almost surely, 2^123130121 is an apocalyptic number.

It is an amenable number.

123130121 is a deficient number, since it is larger than the sum of its proper divisors (1837831).

123130121 is an equidigital number, since it uses as much as digits as its factorization.

123130121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1837830.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 123130121 is about 11096.4012634728. The cubic root of 123130121 is about 497.4942918295.

Adding to 123130121 its reverse (121031321), we get a palindrome (244161442).

The spelling of 123130121 in words is "one hundred twenty-three million, one hundred thirty thousand, one hundred twenty-one".