21202112330 has 24 divisors (see below), whose sum is σ = 44394628068.
Its totient is φ = 7269295488.
The previous prime is 21202112311. The next prime is 21202112339. The reversal of 21202112330 is 3321120212.
Adding to 21202112330 its reverse (3321120212), we get a palindrome (24523232542).
It can be written as a sum of positive squares in 2 ways, for example, as 20309955169 + 892157161 = 142513^2 + 29869^2
It is a junction number, because it is equal to n+sod(n) for n = 21202112299 and 21202112308.
It is not an unprimeable number, because it can be changed into a prime (21202112339) by changing a digit.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21634319 + ... + 21635298.
Almost surely, 221202112330 is an apocalyptic number.
21202112330 is an abundant number, since it is smaller than the sum of its proper divisors (23192515738).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
21202112330 is a wasteful number, since it uses less digits than its factorization.
21202112330 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 43269638 (or 43269631 counting only the distinct ones).
The product of its (nonzero) digits is 144, while the sum is 17.
The spelling of 21202112330 in words is "twenty-one billion, two hundred two million, one hundred twelve thousand, three hundred thirty".