212210121122011 has 4 divisors (see below), whose sum is σ = 212217754882000. Its totient is φ = 212202487362024.

The previous prime is 212210121121961. The next prime is 212210121122161. The reversal of 212210121122011 is 110221121012212.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 212210121122011 - 2¹⁷ = 212210120990939 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212210121122011.

It is not an unprimeable number, because it can be changed into a prime (212210121122911) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 3816838296 + ... + 3816893893.

It is an arithmetic number, because the mean of its divisors is an integer number (53054438720500).

Almost surely, 2^{212210121122011} is an apocalyptic number.

212210121122011 is a deficient number, since it is larger than the sum of its proper divisors (7633759989).

212210121122011 is an equidigital number, since it uses as much as digits as its factorization.

212210121122011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7633759988.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 212210121122011 its reverse (110221121012212), we get a palindrome (322431242134223).

The spelling of 212210121122011 in words is "two hundred twelve trillion, two hundred ten billion, one hundred twenty-one million, one hundred twenty-two thousand, eleven".