2121123230 has 16 divisors (see below), whose sum is σ = 3941184384. Its totient is φ = 821079840.

The previous prime is 2121123211. The next prime is 2121123239. The reversal of 2121123230 is 323211212.

It is a junction number, because it is equal to n+sod(n) for n = 2121123199 and 2121123208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121123239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3420857 + ... + 3421476.

It is an arithmetic number, because the mean of its divisors is an integer number (246324024).

Almost surely, 2^2121123230 is an apocalyptic number.

2121123230 is a deficient number, since it is larger than the sum of its proper divisors (1820061154).

2121123230 is a wasteful number, since it uses less digits than its factorization.

2121123230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6842371.

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

The square root of 2121123230 is about 46055.6536160329. The cubic root of 2121123230 is about 1284.8584945139.

Adding to 2121123230 its reverse (323211212), we get a palindrome (2444334442).

The spelling of 2121123230 in words is "two billion, one hundred twenty-one million, one hundred twenty-three thousand, two hundred thirty".