210201210121211 has 4 divisors (see below), whose sum is σ = 215089610356632. Its totient is φ = 205312809885792.

The previous prime is 210201210121207. The next prime is 210201210121261. The reversal of 210201210121211 is 112121012102012.

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 210201210121211 - 2² = 210201210121207 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 210201210121211.

It is not an unprimeable number, because it can be changed into a prime (210201210121261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2444200117646 + ... + 2444200117731.

It is an arithmetic number, because the mean of its divisors is an integer number (53772402589158).

Almost surely, 2^{210201210121211} is an apocalyptic number.

210201210121211 is a deficient number, since it is larger than the sum of its proper divisors (4888400235421).

210201210121211 is an equidigital number, since it uses as much as digits as its factorization.

210201210121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4888400235420.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 210201210121211 its reverse (112121012102012), we get a palindrome (322322222223223).

The spelling of 210201210121211 in words is "two hundred ten trillion, two hundred one billion, two hundred ten million, one hundred twenty-one thousand, two hundred eleven".