212311112122 has 4 divisors (see below), whose sum is σ = 318466668186. Its totient is φ = 106155556060.

The previous prime is 212311112051. The next prime is 212311112131. The reversal of 212311112122 is 221211113212.

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., 193451308561 + 18859803561 = 439831^2 + 137331^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 212311112122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53077778029 + ... + 53077778032.

Almost surely, 2^212311112122 is an apocalyptic number.

212311112122 is a deficient number, since it is larger than the sum of its proper divisors (106155556064).

212311112122 is a wasteful number, since it uses less digits than its factorization.

212311112122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106155556063.

The product of its digits is 96, while the sum is 19.

Adding to 212311112122 its reverse (221211113212), we get a palindrome (433522225334).

The spelling of 212311112122 in words is "two hundred twelve billion, three hundred eleven million, one hundred twelve thousand, one hundred twenty-two".