210121200011211 has 32 divisors (see below), whose sum is σ = 281469247488000. Its totient is φ = 139427935509408.

The previous prime is 210121200011207. The next prime is 210121200011213. The reversal of 210121200011211 is 112110002121012.

It is a happy number.

It is not a de Polignac number, because 210121200011211 - 2² = 210121200011207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (210121200011213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6493423050 + ... + 6493455408.

It is an arithmetic number, because the mean of its divisors is an integer number (8795913984000).

Almost surely, 2^{210121200011211} is an apocalyptic number.

210121200011211 is a deficient number, since it is larger than the sum of its proper divisors (71348047476789).

210121200011211 is a wasteful number, since it uses less digits than its factorization.

210121200011211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39463.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 210121200011211 its reverse (112110002121012), we get a palindrome (322231202132223).

The spelling of 210121200011211 in words is "two hundred ten trillion, one hundred twenty-one billion, two hundred million, eleven thousand, two hundred eleven".