21202112024 has 16 divisors (see below), whose sum is σ = 39794089920. Its totient is φ = 10590354720.

The previous prime is 21202111999. The next prime is 21202112051. The reversal of 21202112024 is 42021120212.

It is a junction number, because it is equal to n+sod(n) for n = 21202111993 and 21202112011.

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, 1329239 + ... + 1345094.

It is an arithmetic number, because the mean of its divisors is an integer number (2487130620).

Almost surely, 2^21202112024 is an apocalyptic number.

It is an amenable number.

21202112024 is a deficient number, since it is larger than the sum of its proper divisors (18591977896).

21202112024 is a wasteful number, since it uses less digits than its factorization.

21202112024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2675330 (or 2675326 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21202112024 its reverse (42021120212), we get a palindrome (63223232236).

The spelling of 21202112024 in words is "twenty-one billion, two hundred two million, one hundred twelve thousand, twenty-four".