123121130 has 48 divisors (see below), whose sum is σ = 246342600. Its totient is φ = 44267520.

The previous prime is 123121129. The next prime is 123121133. The reversal of 123121130 is 31121321.

123121130 = 242² + 243² + ... + 726².

It can be written as a sum of positive squares in 4 ways, for example, as 115498009 + 7623121 = 10747^2 + 2761^2 .

It is not an unprimeable number, because it can be changed into a prime (123121133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 116846 + ... + 117894.

Almost surely, 2^123121130 is an apocalyptic number.

123121130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123121130 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

123121130 is a wasteful number, since it uses less digits than its factorization.

123121130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1175 (or 1164 counting only the distinct ones).

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

The square root of 123121130 is about 11095.9961247290. The cubic root of 123121130 is about 497.4821824717.

Adding to 123121130 its reverse (31121321), we get a palindrome (154242451).

The spelling of 123121130 in words is "one hundred twenty-three million, one hundred twenty-one thousand, one hundred thirty".