21222201332 has 24 divisors (see below), whose sum is σ = 37368537192. Its totient is φ = 10545526400.

The previous prime is 21222201331. The next prime is 21222201337. The reversal of 21222201332 is 23310222212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11133204196 + 10088997136 = 105514^2 + 100444^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222201331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2390582 + ... + 2399442.

It is an arithmetic number, because the mean of its divisors is an integer number (1557022383).

Almost surely, 2^21222201332 is an apocalyptic number.

It is an amenable number.

21222201332 is a deficient number, since it is larger than the sum of its proper divisors (16146335860).

21222201332 is a wasteful number, since it uses less digits than its factorization.

21222201332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12499 (or 12497 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21222201332 its reverse (23310222212), we get a palindrome (44532423544).

The spelling of 21222201332 in words is "twenty-one billion, two hundred twenty-two million, two hundred one thousand, three hundred thirty-two".