210120200121211 has 4 divisors (see below), whose sum is σ = 210120383484232. Its totient is φ = 210120016758192.

The previous prime is 210120200121199. The next prime is 210120200121281. The reversal of 210120200121211 is 112121002021012.

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 210120200121211 - 2³⁵ = 210085840382843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210120200121281) 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, 89951745 + ... + 92258098.

It is an arithmetic number, because the mean of its divisors is an integer number (52530095871058).

Almost surely, 2^{210120200121211} is an apocalyptic number.

210120200121211 is a deficient number, since it is larger than the sum of its proper divisors (183363021).

210120200121211 is a wasteful number, since it uses less digits than its factorization.

210120200121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183363020.

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

Adding to 210120200121211 its reverse (112121002021012), we get a palindrome (322241202142223).

The spelling of 210120200121211 in words is "two hundred ten trillion, one hundred twenty billion, two hundred million, one hundred twenty-one thousand, two hundred eleven".