21321332022 has 32 divisors (see below), whose sum is σ = 42872872032. Its totient is φ = 7068847104.

The previous prime is 21321331991. The next prime is 21321332027. The reversal of 21321332022 is 22023312312.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21321332022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21321332027) 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, 828168 + ... + 853524.

It is an arithmetic number, because the mean of its divisors is an integer number (1339777251).

Almost surely, 2^21321332022 is an apocalyptic number.

21321332022 is an abundant number, since it is smaller than the sum of its proper divisors (21551540010).

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

21321332022 is a wasteful number, since it uses less digits than its factorization.

21321332022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26112.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21321332022 its reverse (22023312312), we get a palindrome (43344644334).

The spelling of 21321332022 in words is "twenty-one billion, three hundred twenty-one million, three hundred thirty-two thousand, twenty-two".