21002002232244 has 48 divisors (see below), whose sum is σ = 54763535768256. Its totient is φ = 6209017657600.

The previous prime is 21002002232243. The next prime is 21002002232257. The reversal of 21002002232244 is 44223220020012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002002232243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1940312607 + ... + 1940323430.

It is an arithmetic number, because the mean of its divisors is an integer number (1140906995172).

Almost surely, 2^{21002002232244} is an apocalyptic number.

It is an amenable number.

21002002232244 is an abundant number, since it is smaller than the sum of its proper divisors (33761533536012).

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

21002002232244 is a wasteful number, since it uses less digits than its factorization.

21002002232244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3880636096 (or 3880636094 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 21002002232244 its reverse (44223220020012), we get a palindrome (65225222252256).

The spelling of 21002002232244 in words is "twenty-one trillion, two billion, two million, two hundred thirty-two thousand, two hundred forty-four".