21222012322 has 64 divisors (see below), whose sum is σ = 39265689600. Its totient is φ = 8395833600.

The previous prime is 21222012313. The next prime is 21222012359. The reversal of 21222012322 is 22321022212.

It is a self number, because there is not a number n which added to its sum of digits gives 21222012322.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3359547 + ... + 3365857.

It is an arithmetic number, because the mean of its divisors is an integer number (613526400).

Almost surely, 2^21222012322 is an apocalyptic number.

21222012322 is a deficient number, since it is larger than the sum of its proper divisors (18043677278).

21222012322 is a wasteful number, since it uses less digits than its factorization.

21222012322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6607.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21222012322 its reverse (22321022212), we get a palindrome (43543034534).

The spelling of 21222012322 in words is "twenty-one billion, two hundred twenty-two million, twelve thousand, three hundred twenty-two".