22121202212 has 12 divisors (see below), whose sum is σ = 38713150476. Its totient is φ = 11060302080.

The previous prime is 22121202203. The next prime is 22121202217. The reversal of 22121202212 is 21220212122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15793954276 + 6327247936 = 125674^2 + 79544^2 .

It is not an unprimeable number, because it can be changed into a prime (22121202217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227288 + ... + 309680.

It is an arithmetic number, because the mean of its divisors is an integer number (3226095873).

Almost surely, 2^22121202212 is an apocalyptic number.

It is an amenable number.

22121202212 is a deficient number, since it is larger than the sum of its proper divisors (16591948264).

22121202212 is a wasteful number, since it uses less digits than its factorization.

22121202212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149518 (or 149516 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 22121202212 its reverse (21220212122), we get a palindrome (43341414334).

The spelling of 22121202212 in words is "twenty-two billion, one hundred twenty-one million, two hundred two thousand, two hundred twelve".