21322322212 has 6 divisors (see below), whose sum is σ = 37314063878. Its totient is φ = 10661161104.

The previous prime is 21322322183. The next prime is 21322322243. The reversal of 21322322212 is 21222322312.

It can be written as a sum of positive squares in only one way, i.e., 17546711296 + 3775610916 = 132464^2 + 61446^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2665290273 + ... + 2665290280.

Almost surely, 2^21322322212 is an apocalyptic number.

It is an amenable number.

21322322212 is a deficient number, since it is larger than the sum of its proper divisors (15991741666).

21322322212 is a wasteful number, since it uses less digits than its factorization.

21322322212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5330580557 (or 5330580555 counting only the distinct ones).

The product of its digits is 1152, while the sum is 22.

Adding to 21322322212 its reverse (21222322312), we get a palindrome (42544644524).

The spelling of 21322322212 in words is "twenty-one billion, three hundred twenty-two million, three hundred twenty-two thousand, two hundred twelve".