212211223442 has 4 divisors (see below), whose sum is σ = 318316835166. Its totient is φ = 106105611720.

The previous prime is 212211223417. The next prime is 212211223489. The reversal of 212211223442 is 244322112212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 207197025721 + 5014197721 = 455189^2 + 70811^2 .

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 as a sum of consecutive naturals, namely, 53052805859 + ... + 53052805862.

Almost surely, 2^212211223442 is an apocalyptic number.

212211223442 is a deficient number, since it is larger than the sum of its proper divisors (106105611724).

212211223442 is a wasteful number, since it uses less digits than its factorization.

212211223442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106105611723.

The product of its digits is 3072, while the sum is 26.

Adding to 212211223442 its reverse (244322112212), we get a palindrome (456533335654).

The spelling of 212211223442 in words is "two hundred twelve billion, two hundred eleven million, two hundred twenty-three thousand, four hundred forty-two".