211103123122 has 4 divisors (see below), whose sum is σ = 316654684686. Its totient is φ = 105551561560.

The previous prime is 211103123113. The next prime is 211103123137. The reversal of 211103123122 is 221321301112.

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., 211095221401 + 7901721 = 459451^2 + 2811^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 211103123122.

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, 52775780779 + ... + 52775780782.

Almost surely, 2^211103123122 is an apocalyptic number.

211103123122 is a deficient number, since it is larger than the sum of its proper divisors (105551561564).

211103123122 is a wasteful number, since it uses less digits than its factorization.

211103123122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105551561563.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 211103123122 its reverse (221321301112), we get a palindrome (432424424234).

The spelling of 211103123122 in words is "two hundred eleven billion, one hundred three million, one hundred twenty-three thousand, one hundred twenty-two".