21120083224 has 16 divisors (see below), whose sum is σ = 41321902320. Its totient is φ = 10100909280.

The previous prime is 21120083207. The next prime is 21120083227. The reversal of 21120083224 is 42238002112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120083227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57391347 + ... + 57391714.

It is an arithmetic number, because the mean of its divisors is an integer number (2582618895).

Almost surely, 2^21120083224 is an apocalyptic number.

It is an amenable number.

21120083224 is a deficient number, since it is larger than the sum of its proper divisors (20201819096).

21120083224 is a wasteful number, since it uses less digits than its factorization.

21120083224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114783090 (or 114783086 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 21120083224 its reverse (42238002112), we get a palindrome (63358085336).

The spelling of 21120083224 in words is "twenty-one billion, one hundred twenty million, eighty-three thousand, two hundred twenty-four".