21322224212 has 6 divisors (see below), whose sum is σ = 37313892378. Its totient is φ = 10661112104.

The previous prime is 21322224139. The next prime is 21322224239. The reversal of 21322224212 is 21242222312.

It can be written as a sum of positive squares in only one way, i.e., 21055751236 + 266472976 = 145106^2 + 16324^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2665278023 + ... + 2665278030.

It is an arithmetic number, because the mean of its divisors is an integer number (6218982063).

Almost surely, 2^21322224212 is an apocalyptic number.

It is an amenable number.

21322224212 is a deficient number, since it is larger than the sum of its proper divisors (15991668166).

21322224212 is a wasteful number, since it uses less digits than its factorization.

21322224212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5330556057 (or 5330556055 counting only the distinct ones).

The product of its digits is 1536, while the sum is 23.

Adding to 21322224212 its reverse (21242222312), we get a palindrome (42564446524).

The spelling of 21322224212 in words is "twenty-one billion, three hundred twenty-two million, two hundred twenty-four thousand, two hundred twelve".