21225100332 has 12 divisors (see below), whose sum is σ = 49525234136. Its totient is φ = 7075033440.

The previous prime is 21225100331. The next prime is 21225100343. The reversal of 21225100332 is 23300152212.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 21225100299 and 21225100308.

It is not an unprimeable number, because it can be changed into a prime (21225100331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 884379169 + ... + 884379192.

Almost surely, 2^21225100332 is an apocalyptic number.

It is an amenable number.

21225100332 is an abundant number, since it is smaller than the sum of its proper divisors (28300133804).

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

21225100332 is a wasteful number, since it uses less digits than its factorization.

21225100332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1768758368 (or 1768758366 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 21225100332 its reverse (23300152212), we get a palindrome (44525252544).

The spelling of 21225100332 in words is "twenty-one billion, two hundred twenty-five million, one hundred thousand, three hundred thirty-two".