2121224432 has 20 divisors (see below), whose sum is σ = 4132584456. Its totient is φ = 1054751040.

The previous prime is 2121224359. The next prime is 2121224477. The reversal of 2121224432 is 2344221212.

It is a junction number, because it is equal to n+sod(n) for n = 2121224398 and 2121224407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 363338 + ... + 369129.

Almost surely, 2^2121224432 is an apocalyptic number.

It is an amenable number.

2121224432 is a deficient number, since it is larger than the sum of its proper divisors (2011360024).

2121224432 is a wasteful number, since it uses less digits than its factorization.

2121224432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732656 (or 732650 counting only the distinct ones).

The product of its digits is 1536, while the sum is 23.

The square root of 2121224432 is about 46056.7522954018. The cubic root of 2121224432 is about 1284.8789283701.

Adding to 2121224432 its reverse (2344221212), we get a palindrome (4465445644).

The spelling of 2121224432 in words is "two billion, one hundred twenty-one million, two hundred twenty-four thousand, four hundred thirty-two".