2123121232 has 20 divisors (see below), whose sum is σ = 4114424160. Its totient is φ = 1061334368.

The previous prime is 2123121197. The next prime is 2123121241. The reversal of 2123121232 is 2321213212.

It is a congruent number.

It is an unprimeable number.

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, 83853 + ... + 106195.

It is an arithmetic number, because the mean of its divisors is an integer number (205721208).

Almost surely, 2^2123121232 is an apocalyptic number.

It is an amenable number.

2123121232 is a deficient number, since it is larger than the sum of its proper divisors (1991302928).

2123121232 is a wasteful number, since it uses less digits than its factorization.

2123121232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28290 (or 28284 counting only the distinct ones).

The product of its digits is 288, while the sum is 19.

The square root of 2123121232 is about 46077.3396801508. The cubic root of 2123121232 is about 1285.2617940772.

Adding to 2123121232 its reverse (2321213212), we get a palindrome (4444334444).

The spelling of 2123121232 in words is "two billion, one hundred twenty-three million, one hundred twenty-one thousand, two hundred thirty-two".