21033221322 has 16 divisors (see below), whose sum is σ = 42309603360. Its totient is φ = 6970546992.

The previous prime is 21033221303. The next prime is 21033221333. The reversal of 21033221322 is 22312233012.

It is a happy 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, 10130572 + ... + 10132647.

It is an arithmetic number, because the mean of its divisors is an integer number (2644350210).

Almost surely, 2^21033221322 is an apocalyptic number.

21033221322 is an abundant number, since it is smaller than the sum of its proper divisors (21276382038).

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

21033221322 is a wasteful number, since it uses less digits than its factorization.

21033221322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20263397.

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

Adding to 21033221322 its reverse (22312233012), we get a palindrome (43345454334).

The spelling of 21033221322 in words is "twenty-one billion, thirty-three million, two hundred twenty-one thousand, three hundred twenty-two".