22101212212 has 24 divisors (see below), whose sum is σ = 39492534312. Its totient is φ = 10818537600.

The previous prime is 22101212207. The next prime is 22101212227. The reversal of 22101212212 is 21221210122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4245304336 + 17855907876 = 65156^2 + 133626^2 .

It is a congruent number.

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 in 7 ways as a sum of consecutive naturals, for example, 15339 + ... + 210802.

It is an arithmetic number, because the mean of its divisors is an integer number (1645522263).

Almost surely, 2^22101212212 is an apocalyptic number.

It is an amenable number.

22101212212 is a deficient number, since it is larger than the sum of its proper divisors (17391322100).

22101212212 is a wasteful number, since it uses less digits than its factorization.

22101212212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226659 (or 226657 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22101212212 its reverse (21221210122), we get a palindrome (43322422334).

The spelling of 22101212212 in words is "twenty-two billion, one hundred one million, two hundred twelve thousand, two hundred twelve".