21202201332 has 60 divisors (see below), whose sum is σ = 59690349796. Its totient is φ = 6523752960.

The previous prime is 21202201313. The next prime is 21202201337. The reversal of 21202201332 is 23310220212.

It can be written as a sum of positive squares in 2 ways, for example, as 2101855716 + 19100345616 = 45846^2 + 138204^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202201337) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2512669 + ... + 2521092.

Almost surely, 2^21202201332 is an apocalyptic number.

It is an amenable number.

21202201332 is an abundant number, since it is smaller than the sum of its proper divisors (38488148464).

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

21202201332 is a wasteful number, since it uses less digits than its factorization.

21202201332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5033790 (or 5033779 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21202201332 its reverse (23310220212), we get a palindrome (44512421544).

The spelling of 21202201332 in words is "twenty-one billion, two hundred two million, two hundred one thousand, three hundred thirty-two".