22222100212 has 24 divisors (see below), whose sum is σ = 42043094856. Its totient is φ = 10216439808.

The previous prime is 22222100203. The next prime is 22222100269. The reversal of 22222100212 is 21200122222.

It can be written as a sum of positive squares in 4 ways, for example, as 2993840656 + 19228259556 = 54716^2 + 138666^2 .

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, 818053 + ... + 844780.

It is an arithmetic number, because the mean of its divisors is an integer number (1751795619).

Almost surely, 2^22222100212 is an apocalyptic number.

It is an amenable number.

22222100212 is a deficient number, since it is larger than the sum of its proper divisors (19820994644).

22222100212 is a wasteful number, since it uses less digits than its factorization.

22222100212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1663107 (or 1663105 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 22222100212 its reverse (21200122222), we get a palindrome (43422222434).

The spelling of 22222100212 in words is "twenty-two billion, two hundred twenty-two million, one hundred thousand, two hundred twelve".