21202112324 has 24 divisors (see below), whose sum is σ = 37786694400. Its totient is φ = 10406429600.

The previous prime is 21202112311. The next prime is 21202112339. The reversal of 21202112324 is 42321120212.

It is a junction number, because it is equal to n+sod(n) for n = 21202112296 and 21202112305.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101357 + ... + 229515.

It is an arithmetic number, because the mean of its divisors is an integer number (1574445600).

Almost surely, 2^21202112324 is an apocalyptic number.

It is an amenable number.

21202112324 is a deficient number, since it is larger than the sum of its proper divisors (16584582076).

21202112324 is a wasteful number, since it uses less digits than its factorization.

21202112324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128923 (or 128921 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21202112324 its reverse (42321120212), we get a palindrome (63523232536).

The spelling of 21202112324 in words is "twenty-one billion, two hundred two million, one hundred twelve thousand, three hundred twenty-four".