21220202332 has 24 divisors (see below), whose sum is σ = 44936900064. Its totient is φ = 8559409152.

The previous prime is 21220202329. The next prime is 21220202359. The reversal of 21220202332 is 23320202212.

It is a super-2 number, since 2×21220202332² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22289653 + ... + 22290604.

It is an arithmetic number, because the mean of its divisors is an integer number (1872370836).

Almost surely, 2^21220202332 is an apocalyptic number.

It is an amenable number.

21220202332 is an abundant number, since it is smaller than the sum of its proper divisors (23716697732).

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

21220202332 is a wasteful number, since it uses less digits than its factorization.

21220202332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44580285 (or 44580283 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 21220202332 its reverse (23320202212), we get a palindrome (44540404544).

The spelling of 21220202332 in words is "twenty-one billion, two hundred twenty million, two hundred two thousand, three hundred thirty-two".