21202112322 has 24 divisors (see below), whose sum is σ = 46168761600. Its totient is φ = 7031855160.

The previous prime is 21202112311. The next prime is 21202112339. The reversal of 21202112322 is 22321120212.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21202112295 and 21202112304.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2955954 + ... + 2963117.

It is an arithmetic number, because the mean of its divisors is an integer number (1923698400).

Almost surely, 2^21202112322 is an apocalyptic number.

21202112322 is an abundant number, since it is smaller than the sum of its proper divisors (24966649278).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21202112322 is a wasteful number, since it uses less digits than its factorization.

21202112322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5919278 (or 5919275 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21202112322 its reverse (22321120212), we get a palindrome (43523232534).

The spelling of 21202112322 in words is "twenty-one billion, two hundred two million, one hundred twelve thousand, three hundred twenty-two".