211222135444 has 24 divisors (see below), whose sum is σ = 374394115368. Its totient is φ = 104260907520.

The previous prime is 211222135429. The next prime is 211222135459. The reversal of 211222135444 is 444531222112.

211222135444 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (211222135429) and next prime (211222135459).

It can be written as a sum of positive squares in 4 ways, for example, as 506250000 + 210715885444 = 22500^2 + 459038^2 .

It is a super-2 number, since 2×211222135444² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 965569 + ... + 1163944.

It is an arithmetic number, because the mean of its divisors is an integer number (15599754807).

Almost surely, 2^211222135444 is an apocalyptic number.

It is an amenable number.

211222135444 is a deficient number, since it is larger than the sum of its proper divisors (163171979924).

211222135444 is a wasteful number, since it uses less digits than its factorization.

211222135444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2129835 (or 2129833 counting only the distinct ones).

The product of its digits is 15360, while the sum is 31.

Adding to 211222135444 its reverse (444531222112), we get a palindrome (655753357556).

The spelling of 211222135444 in words is "two hundred eleven billion, two hundred twenty-two million, one hundred thirty-five thousand, four hundred forty-four".