211122121201 has 4 divisors (see below), whose sum is σ = 211135354612. Its totient is φ = 211108887792.

The previous prime is 211122121181. The next prime is 211122121237. The reversal of 211122121201 is 102121221112.

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

It can be written as a sum of positive squares in 2 ways, for example, as 113787480976 + 97334640225 = 337324^2 + 311985^2 .

It is a cyclic number.

It is not a de Polignac number, because 211122121201 - 2⁹ = 211122120689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211122121261) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 6592746 + ... + 6624691.

It is an arithmetic number, because the mean of its divisors is an integer number (52783838653).

Almost surely, 2^211122121201 is an apocalyptic number.

It is an amenable number.

211122121201 is a deficient number, since it is larger than the sum of its proper divisors (13233411).

211122121201 is a wasteful number, since it uses less digits than its factorization.

211122121201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13233410.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 211122121201 its reverse (102121221112), we get a palindrome (313243342313).

The spelling of 211122121201 in words is "two hundred eleven billion, one hundred twenty-two million, one hundred twenty-one thousand, two hundred one".