212011212122 has 4 divisors (see below), whose sum is σ = 318016818186. Its totient is φ = 106005606060.

The previous prime is 212011212053. The next prime is 212011212151. The reversal of 212011212122 is 221212110212.

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., 134704414441 + 77306797681 = 367021^2 + 278041^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 212011212122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53002803029 + ... + 53002803032.

Almost surely, 2^212011212122 is an apocalyptic number.

212011212122 is a deficient number, since it is larger than the sum of its proper divisors (106005606064).

212011212122 is a wasteful number, since it uses less digits than its factorization.

212011212122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106005606063.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 212011212122 its reverse (221212110212), we get a palindrome (433223322334).

The spelling of 212011212122 in words is "two hundred twelve billion, eleven million, two hundred twelve thousand, one hundred twenty-two".