123121232 has 30 divisors (see below), whose sum is σ = 258314382. Its totient is φ = 56823936.

The previous prime is 123121217. The next prime is 123121249. The reversal of 123121232 is 232121321.

It can be written as a sum of positive squares in 3 ways, for example, as 16 + 123121216 = 4^2 + 11096^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 123121232.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20063 + ... + 25470.

Almost surely, 2^123121232 is an apocalyptic number.

It is an amenable number.

123121232 is an abundant number, since it is smaller than the sum of its proper divisors (135193150).

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

123121232 is a wasteful number, since it uses less digits than its factorization.

123121232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45567 (or 45548 counting only the distinct ones).

The product of its digits is 144, while the sum is 17.

The square root of 123121232 is about 11096.0007209805. Note that the first 3 decimals coincide. The cubic root of 123121232 is about 497.4823198518.

Adding to 123121232 its reverse (232121321), we get a palindrome (355242553).

The spelling of 123121232 in words is "one hundred twenty-three million, one hundred twenty-one thousand, two hundred thirty-two".