123121230 has 16 divisors (see below), whose sum is σ = 295491024. Its totient is φ = 32832320.

The previous prime is 123121217. The next prime is 123121249. The reversal of 123121230 is 32121321.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2051991 + ... + 2052050.

It is an arithmetic number, because the mean of its divisors is an integer number (18468189).

Almost surely, 2^123121230 is an apocalyptic number.

123121230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123121230 is an abundant number, since it is smaller than the sum of its proper divisors (172369794).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123121230 is a wasteful number, since it uses less digits than its factorization.

123121230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4104051.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 123121230 is about 11096.0006308579. Note that the first 3 decimals coincide. The cubic root of 123121230 is about 497.4823171581.

Adding to 123121230 its reverse (32121321), we get a palindrome (155242551).

Subtracting from 123121230 its reverse (32121321), we obtain a palindrome (90999909).

The spelling of 123121230 in words is "one hundred twenty-three million, one hundred twenty-one thousand, two hundred thirty".