21211010022212 has 6 divisors (see below), whose sum is σ = 37119267538878. Its totient is φ = 10605505011104.

The previous prime is 21211010022193. The next prime is 21211010022227. The reversal of 21211010022212 is 21222001011212.

It can be written as a sum of positive squares in only one way, i.e., 20530015372036 + 680994650176 = 4531006^2 + 825224^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2651376252773 + ... + 2651376252780.

It is an arithmetic number, because the mean of its divisors is an integer number (6186544589813).

Almost surely, 2^{21211010022212} is an apocalyptic number.

It is an amenable number.

21211010022212 is a deficient number, since it is larger than the sum of its proper divisors (15908257516666).

21211010022212 is a wasteful number, since it uses less digits than its factorization.

21211010022212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5302752505557 (or 5302752505555 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21211010022212 its reverse (21222001011212), we get a palindrome (42433011033424).

The spelling of 21211010022212 in words is "twenty-one trillion, two hundred eleven billion, ten million, twenty-two thousand, two hundred twelve".